2012 GMC Sierra Owner's Manual
2012 GMC Sierra Manual
2012 GMC Sierra manual content summary:
- 2012 GMC Sierra | Owner's Manual - Page 1
2012 GMC Sierra Owner Manual M In Brief ...1-1 Instrument Panel ...1-2 Initial Drive Information ...1-8 Vehicle Features ...1-27 Performance and Maintenance ...1-35 Keys, Doors, and Windows ...2-1 Keys and Locks ...2-2 Doors ...2-9 Vehicle Security...2-11 Exterior Mirrors ...2-14 Interior Air Vents - 2012 GMC Sierra | Owner's Manual - Page 2
2012 GMC Sierra Owner Manual M Ride Control Systems ...9-55 Cruise Control ...9-58 Object Detection Systems ...9-61 Fuel ...9-68 Towing ...9-74 Conversions and Add- 11-3 Special Application Services ...11-8 Additional Maintenance and Care ...11-9 Recommended Fluids, Lubricants, and Parts ...11-12 - 2012 GMC Sierra | Owner's Manual - Page 3
model names, and vehicle body designs appearing in this manual including, but not limited to, GM, the GM logo, GMC, the GMC Truck Emblem, and SIERRA are trademarks and/or service printing of this owner manual. Litho in U.S.A. Part No. 20902916 B Second Printing © 2011 General Motors LLC. All - 2012 GMC Sierra | Owner's Manual - Page 4
or death. M : This symbol is shown when you need to see your owner manual for additional instructions or information. * : This symbol is shown when you need to see a service manual for additional instructions or information. A circle with a slash through it is a safety symbol which means "Do - 2012 GMC Sierra | Owner's Manual - Page 5
For more information on the symbol, refer to the Index. v 0 : Adjustable Pedals 9 : Airbag Readiness Light # : Air Conditioning ! : Antilock Brake System (ABS) % : Audio Steering Wheel Controls or OnStar® I : Cruise Control B : Engine Coolant Temperature O : Exterior Lamps # : Fog Lamps . : Fuel - 2012 GMC Sierra | Owner's Manual - Page 6
vi Introduction 2 NOTES - 2012 GMC Sierra | Owner's Manual - Page 7
...Passenger Sensing System ...Mirror Adjustment ...Steering Wheel Adjustment ...Throttle and Brake Pedal Adjustment ...Interior Lighting ...Exterior Lighting ...Windshield Wiper/Washer ...Climate Controls ...Transmission ...Four-Wheel Drive ... 1-16 1-16 1-16 1-19 1-19 1-20 1-21 1-21 1-22 1-24 1-25 - 2012 GMC Sierra | Owner's Manual - Page 8
1-2 In Brief Instrument Panel Instrument Panel (Base/Uplevel Version) - 2012 GMC Sierra | Owner's Manual - Page 9
Brief A. Air Vents on Transmission and Hydra-Matic® 6‐Speed Button) (If Equipped). See Manual Mode on page 9‑38. G. Infotainment on page 7‑1. H. Cruise Control on page 9‑58. P. Steering Wheel Adjustment on page 5‑2. Q. Horn on page 5‑4. R. Steering Wheel Controls on page 5‑2 (If Equipped). S. - 2012 GMC Sierra | Owner's Manual - Page 10
Throttle and Brake Pedal on page 9‑25. Exhaust Brake (If Equipped). See "Brakes" in the Duramax diesel supplement. W. Climate Control Systems (with Air Conditioning) on page 8‑1 or Climate Control Systems (with Heater Only) on page 8‑4 (If Equipped). Dual Automatic Climate Control System on page - 2012 GMC Sierra | Owner's Manual - Page 11
In Brief 1-5 2 NOTES - 2012 GMC Sierra | Owner's Manual - Page 12
1-6 In Brief Instrument Panel (Premium Version) - 2012 GMC Sierra | Owner's Manual - Page 13
Transmission on page 9‑35. Range Selection Mode (If Equipped). See Manual Mode on page 9‑38. F. Tow/Haul Mode on page 9‑39 Wheel Drive on page 10‑30. 1-7 Q. Steering Wheel Adjustment on page 5‑2. R. Horn on page 5‑4. S. Steering Wheel Controls on page 5‑2. T. Climate Control Systems (with Air - 2012 GMC Sierra | Owner's Manual - Page 14
may not be on your specific vehicle. For more detailed information, refer to each of the features which can be found later in this owner manual. W. Passenger Airbag Off Control (If Equipped). See Airbag On-Off Switch on page 3‑29. Remote Keyless Entry (RKE) System The RKE transmitter is used to - 2012 GMC Sierra | Owner's Manual - Page 15
. Repeat the steps for a 10-minute time extension. Remote start can be extended only once. 1-9 Door Locks There are several ways to lock and unlock the door locks or the manual door locks. To lock or unlock the door with the manual locks, push down or pull up on the manual lock knob. Remote - 2012 GMC Sierra | Owner's Manual - Page 16
hand crank on each door to manually raise or lower the manual windows. Power Windows Base Trim Crew Cab Premium Trim Shown, Up-Level and Power Door Locks on page 2‑8 for more information. Crew Cab Premium Trim Shown, Others Models Similar The driver door has a switch to control all windows. - 2012 GMC Sierra | Owner's Manual - Page 17
Rear Window Seat Adjustment Manual Seats Windows on page 2‑19. Power Windows on page 2‑20. If equipped, the power sliding rear window works when the ignition has been turned to ACC/ACCESSORY or ON/RUN, or when Retained Accessory Power (RAP) is active. See Retained Accessory Power (RAP) on page - 2012 GMC Sierra | Owner's Manual - Page 18
control up or down. To adjust the power lumbar support, if equipped: . . On vehicles with two-way lumbar, press and hold the top or bottom of the control to increase or decrease lumbar support. If equipped, increase or decrease manual lumbar support by turning the knob forward or rearward. See - 2012 GMC Sierra | Owner's Manual - Page 19
and hold the front or rear of the control to increase or decrease lumbar support. To raise or lower the height of the support, press and hold the top or bottom of the control. Reclining Seatbacks Manual Reclining Seatbacks To return the seatback to the upright position: 1. Lift the lever fully - 2012 GMC Sierra | Owner's Manual - Page 20
1-14 In Brief Power Reclining Seatbacks Memory Features Storing Memory Positions To save into memory: 1. Adjust the driver seat and seatback recliner, both outside mirrors, and the throttle and brake pedals, if equipped. See Power Mirrors on page 2‑15 and Adjustable Throttle and Brake Pedal on - 2012 GMC Sierra | Owner's Manual - Page 21
In Brief See Memory Seats on page 3‑7 and Vehicle Personalization (With DIC Buttons) on page 5‑48. Easy Exit Driver Seat This feature can move the seat rearward to allow extra room to exit the vehicle. 1-15 Heated and Ventilated Seats J: Press to heat the seat and seatback. Press the button once - 2012 GMC Sierra | Owner's Manual - Page 22
more information. The passenger airbag status indicator will be visible on the overhead console when the vehicle is started. United States Refer to the following sections for page 3‑47. Mirror Adjustment Using hood-mounted air deflectors and add-on convex mirror attachments could decrease mirror - 2012 GMC Sierra | Owner's Manual - Page 23
, or left. See Folding Mirrors on page 2‑16. The mirrors may also include a memory function that works with the memory seats. See Memory Seats on page 3‑7 for more information. 1-17 Crew Cab Up-Level Trim without Power Folding Mirrors 1. Move the selector switch located above the four-way control - 2012 GMC Sierra | Owner's Manual - Page 24
you. Manually pull out the mirror head to extend it for part of the towing mirrors is not heated. See "Rear Window Defogger" under Climate Control Systems (with Air Manually fold the mirrors inward to prevent damage when going through an automatic car wash. See Folding Mirrors on page 2‑16. Interior - 2012 GMC Sierra | Owner's Manual - Page 25
nighttime use to avoid glare from the headlamps from behind. See Manual Rearview Mirror on page 2‑18. Automatic Dimming Rearview Mirror For vehicles Rearview Mirror on page 2‑18. 1-19 Steering Wheel Adjustment Do not adjust the steering wheel while driving. Throttle and Brake Pedal Adjustment On - 2012 GMC Sierra | Owner's Manual - Page 26
. Interior Lighting Dome Lamps The dome lamps are located in the overhead console. They come on when any door is opened and turn off after all the doors are closed. Turn the instrument panel brightness knob located below the dome lamp override button, clockwise to the farthest position to manually - 2012 GMC Sierra | Owner's Manual - Page 27
Lighting For vehicles first sold in Canada, the off position will only work when the vehicle is shifted into P (Park). AUTO: Automatically lamps control is located on the instrument panel to the left of the steering wheel. Turns off the automatic headlamps and Daytime Running Lamps (DRL). Turn the - 2012 GMC Sierra | Owner's Manual - Page 28
/Washer on page 5‑4. Climate Controls These systems control the heating, cooling, and ventilation. Climate Control System (With Air Conditioning) A. Fan Control B. Temperature Control C. Air Delivery Mode Control D. Air Conditioning E. Outside Air F. Air Recirculation G. Rear Window Defogger - 2012 GMC Sierra | Owner's Manual - Page 29
In Brief Climate Control System (With Heater Only) 1-23 A. Fan Control B. Temperature Control C. Air Delivery Mode Control See Climate Control Systems (with Air Conditioning) on page 8‑1 or Climate Control Systems (with Heater Only) on page 8‑4. - 2012 GMC Sierra | Owner's Manual - Page 30
shift lever to the M (Manual) position. The current range will appear next to the M. This is the highest attainable range with all lower gears accessible. As an example, when 5 (Fifth) gear is selected, 1 (First) through 5 (Fifth) gears are available. K. Air Conditioning See Dual Automatic Climate - 2012 GMC Sierra | Owner's Manual - Page 31
Range Selection Mode is active. See Tow/Haul Mode on page 9‑39. Manual Transfer Case Electronic Transfer Case 1-25 Four-Wheel Drive If the vehicle has Four-Wheel Drive, you can send the engine's driving power to all four wheels for extra traction. This transfer case shift lever is on the floor to - 2012 GMC Sierra | Owner's Manual - Page 32
Drive Low if you are driving off-road in deep sand, deep mud, deep snow, and while climbing or descending steep hills. See Four-Wheel Drive on page 9‑40. Automatic Transfer Case This transfer case knob is located next to the steering column. Each transfer case design offers different drive - 2012 GMC Sierra | Owner's Manual - Page 33
to display additional text information related to the current FM-RDS or XM station; or CD, MP3, or WMA song. If information is available during XM, CD, MP3, or WMA playback, the song title information displays on the top line of the display and artist information displays on the bottom line. When - 2012 GMC Sierra | Owner's Manual - Page 34
radio service based in the 48 contiguous United States and 10 Canadian provinces. XM satellite radio has a wide variety of programming and commercial-free music, coast to coast, and in digital-quality sound. Setting the Clock To set the time and date: 1. Turn the ignition key to ACC/ ACCESSORY or - 2012 GMC Sierra | Owner's Manual - Page 35
Bluetooth system before it can be used in the vehicle. Not all phones will support all functions. For more information, visit www.gm.com/bluetooth. For more information, see Bluetooth on page 7‑48. Steering Wheel Controls b / g : Press to silence the vehicle speakers only. Press again to turn the - 2012 GMC Sierra | Owner's Manual - Page 36
a destination has been set, the system provides turn-by-turn instructions for reaching the destination. In addition, the system can help . See the navigation system manual for more information. The DIC buttons are located on the instrument panel, next to the steering wheel. Some vehicles do not - 2012 GMC Sierra | Owner's Manual - Page 37
Active Fuel Management™ indicator, and transmission temperature. The compass and outside air temperature will also be shown in the display. The temperature will be be programmed by using the DIC buttons next to the steering wheel. These features include: ... Language Door Lock and Unlock Settings - 2012 GMC Sierra | Owner's Manual - Page 38
, security systems, and home automation devices. Read the instructions completely before attempting to program the transmitter. Because of . There may be another accessory power outlet in the rear cargo area. If the vehicle has a floor console, there is an accessory power outlet inside the storage - 2012 GMC Sierra | Owner's Manual - Page 39
manually or by using the express-open feature. To open manually Cab) on page 2‑23 or Sunroof (Extended Cab) on page 2‑22. On vehicles with a sunroof, the sunroof only operates when the ignition is in the ACC/ACCESSORY or ON/RUN or the Retained Accessory Power (RAP) is active. See Retained Accessory - 2012 GMC Sierra | Owner's Manual - Page 40
stop the sunroof. See Sunroof (Crew Cab) on page 2‑23 or Sunroof (Extended Cab) on page 2‑22. Crew Cab A. Open or Close B. Vent On vehicles with a sunroof, the sunroof only operates when the ignition is in the ACC/ACCESSORY or ON/RUN or the Retained Accessory Power (RAP) is active. See Retained - 2012 GMC Sierra | Owner's Manual - Page 41
In Brief 1-35 Performance and Maintenance StabiliTrak System If equipped, the vehicle has a traction control system that limits wheel spin and the StabiliTrak system that assists with directional control of the vehicle in difficult driving conditions. Both systems turn on automatically every time - 2012 GMC Sierra | Owner's Manual - Page 42
the unleaded gasoline described under Recommended Fuel on page 9‑68. . . . . Driving for Better Fuel Economy Driving habits can affect fuel mileage. Here are some driving tips to get the best fuel economy possible. . . Roadside Assistance Program U.S.: 1-888-881-3302 TTY Users (U.S.): 1-888 - 2012 GMC Sierra | Owner's Manual - Page 43
to an OnStar advisor who will assess your problem, contact Roadside Assistance, and relay your exact service that includes online service reminders, vehicle maintenance tips, online owner manual, special privileges, and more. Sign up today at: U.S.: gmc.com (click on "Owners," then "Manage My GMC - 2012 GMC Sierra | Owner's Manual - Page 44
1-38 In Brief 2 NOTES - 2012 GMC Sierra | Owner's Manual - Page 45
(Extended Cab) ...2-9 Tailgate ...2-10 Interior Mirrors Manual Rearview 20 2-21 2-21 Exterior Mirrors Convex Mirrors ...Manual Mirrors ...Trailer-Tow Mirrors ...Power Mirrors ...Folding Mirrors ...Heated Mirrors ...Park Tilt Mirrors ...2-14 2-14 2-15 2-15 2-16 2-17 2-17 Roof Sunroof (Extended Cab - 2012 GMC Sierra | Owner's Manual - Page 46
the vehicle. See your dealer if a replacement key or additional key is needed. Remote Keyless Entry (RKE) System See Radio Frequency Statement on page 13‑20 for information regarding Part 15 of the Federal Communications Commission (FCC) rules and Industry Canada Standards RSS-GEN/210/220/310. - 2012 GMC Sierra | Owner's Manual - Page 47
not working correctly, see your dealer or a qualified technician for service. With work up to 60 m (195 ft) away from the vehicle. There are other conditions which can affect the performance all remaining doors unlock. The interior lamps may come on and stay on for 20 seconds or until the ignition is - 2012 GMC Sierra | Owner's Manual - Page 48
again. The ignition must be in LOCK/OFF for the panic alarm to work. Battery Replacement Replace the battery if the REPLACE BATTERY IN REMOTE KEY message your dealer. Carefully insert the tool into the notch located along the parting line of the transmitter. Do not insert the tool too far. Stop - 2012 GMC Sierra | Owner's Manual - Page 49
an automatic climate control system, during remote start, manually turn the heated seats on and off. See other conditions which can affect the performance of the transmitter. See Remote Keyless also start up the vehicle's heating or air conditioning systems and rear window defogger. Normal operation - 2012 GMC Sierra | Owner's Manual - Page 50
engine will run for 10 minutes after each remote start. Or, you can extend the engine run time by another 10 minutes within the first 10 minute This feature allows your dealer to add the manufacturer's remote vehicle start feature. See your dealer to add the manufacturer's remote vehicle start - 2012 GMC Sierra | Owner's Manual - Page 51
) transmitter or the key in the driver door. From inside, use the power door locks or manual door locks. To lock or unlock the door with the manual locks, push down or pull up on the manual lock knob. { WARNING Unlocked doors can be dangerous. . Passengers, especially children, can easily open the - 2012 GMC Sierra | Owner's Manual - Page 52
programmed using the Driver Information Center (DIC). See Vehicle Personalization (With DIC Buttons) on page 5‑48 for more information on DIC programming. Crew Cab Premium Trim Shown, Up-Level Similar Q: K: Press to lock the doors. Press to unlock the doors. Delayed Locking The vehicle may have - 2012 GMC Sierra | Owner's Manual - Page 53
open and the key is in the ignition, all of the doors will lock and then the front passenger door will unlock. Doors Rear Doors (Extended Cab) Safety Locks The vehicle has rear door security locks to prevent passengers from opening the rear doors from the inside. Open the rear doors to - 2012 GMC Sierra | Owner's Manual - Page 54
2-10 Keys, Doors, and Windows The rear access door must be closed before the front door can close. Tailgate { WARNING It is extremely dangerous to ride on the tailgate, even when the vehicle is operated at low speeds. People riding on the tailgate can easily lose their balance and fall in - 2012 GMC Sierra | Owner's Manual - Page 55
Keys, Doors, and Windows To remove the tailgate: 2. With the tailgate about halfway open, lift the right edge of the tailgate from the lower pivot. On vehicles with the tailgate assist feature, raise the tailgate nearly all the way to the closed position prior to removing the left edge. 3. Move the - 2012 GMC Sierra | Owner's Manual - Page 56
locked with the key or the manual door lock. 3. Close the door and flash, check to see if the horn works. The horn fuse may be blown. not flash, see your dealer for service. If you do not want to activate Statement on page 13‑20 for information regarding Part 15 of the Federal Communications - 2012 GMC Sierra | Owner's Manual - Page 57
ACC/ACCESSORY, or START from the LOCK/OFF position. You do not have to manually arm or disarm the system. The security light will come on if there is a problem key, the vehicle needs service. If the vehicle does start, the first key may be faulty. See your dealer who can service the PASS-Key III+ - 2012 GMC Sierra | Owner's Manual - Page 58
can service PASS-Key manual mirrors, they can be adjusted by moving the mirror up and down or left to right to see a little of the side of the vehicle, and have a clear view behind the vehicle. Using hood-mounted air deflectors and add-on convex mirror attachments could decrease mirror performance - 2012 GMC Sierra | Owner's Manual - Page 59
also include a memory function that works with the memory seats. See Memory Seats on page 3‑7 for more information. If the vehicle has towing mirrors, they can be adjusted for a clearer view of the objects behind you. Manually pull out the mirror head to extend it for better visibility when towing - 2012 GMC Sierra | Owner's Manual - Page 60
may also include a memory function that works with the memory seats. See Memory Seats obstructed while folding. They are accidentally manually folded/unfolded. The mirrors will not speeds. . . Crew Cab Premium Trim with Power Folding Mirrors Shown, Other Models Similar . Power Folding If - 2012 GMC Sierra | Owner's Manual - Page 61
return to its original position. Manually fold the mirrors inward to prevent damage when going through an automatic car wash. 2-17 Turn Signal Indicator part of the towing mirror is not heated. Depending on the vehicle's features, see "Rear Window Defogger" under Climate Control Systems (with Air - 2012 GMC Sierra | Owner's Manual - Page 62
2-18 Keys, Doors, and Windows Interior Mirrors Manual Rearview Mirror To adjust the inside rearview mirror, hold the rearview mirror in the center and move it to view the area behind the vehicle. For vehicles with a manual rearview mirror, push the tab forward for daytime use and pull it for - 2012 GMC Sierra | Owner's Manual - Page 63
warm or hot weather. pulsing sound when a window is partially open. To reduce the sound, open another window or the sunroof (if equipped). Manual Windows Turn the hand crank on each door to manually raise or lower the manual windows. The vehicle aerodynamics are designed to improve fuel economy - 2012 GMC Sierra | Owner's Manual - Page 64
2-20 Keys, Doors, and Windows Push the Cab Premium Trim Shown, Others Models Similar The driver door has a switch to control all windows. Each passenger door has a switch to control that window. The power windows only work when the ignition is in ON/RUN or ACC/ ACCESSORY, or when Retained Accessory - 2012 GMC Sierra | Owner's Manual - Page 65
Window See Retained Accessory Power (RAP) on page 9‑29 for more information. . Push the switch to open the window. Pull the switch to close the window. . The power sliding rear window cannot be operated manually. Sun Visors Crew Cab Premium Trim Shown, Others Models Similar o (Window Lockout - 2012 GMC Sierra | Owner's Manual - Page 66
sun. The roller sunshade can be manually operated with the sunroof in an air deflector will automatically raise. The air deflector will retract when the sunroof is closed. Roof Sunroof (Extended Cab) On vehicles with a sunroof, the sunroof only operates when the ignition is in the ACC/ACCESSORY - 2012 GMC Sierra | Owner's Manual - Page 67
opened and closed manually. If an object is in the path of the sunroof while it is closing, the anti-pinch feature will detect the object and stop the sunroof. A. Open or Close B. Vent On vehicles with a sunroof, the sunroof only operates when the ignition is in the ACC/ACCESSORY or ON/RUN - 2012 GMC Sierra | Owner's Manual - Page 68
2-24 Keys, Doors, and Windows 2 NOTES - 2012 GMC Sierra | Owner's Manual - Page 69
Extended Cab) ...Safety Belt Extender ...Safety System Check ...Safety Belt Care ...Replacing Safety Belt System Parts after a Crash ... 3-19 3-19 3-20 3-20 3-20 Passenger Sensing System ...3-32 Servicing the Airbag-Equipped Vehicle ...3-36 Rear Seats Rear Seats (Extended Cab Full Bench) ...3-10 - 2012 GMC Sierra | Owner's Manual - Page 70
3-2 Seats and Restraints Head Restraints Front Seats The front seats have adjustable head restraints in the outboard seating positions. { WARNING With head restraints that are not installed and adjusted properly, there is a greater chance that occupants will suffer a neck/ spinal injury in a - 2012 GMC Sierra | Owner's Manual - Page 71
Seats and Restraints Rear Seats The rear seat has adjustable headrests in the outboard seating positions. The height of the headrest can be adjusted. Pull the headrest up to raise it. To lower the headrest, push down on the headrest. Rear outboard headrests are not designed to be removed. 3-3 - 2012 GMC Sierra | Owner's Manual - Page 72
"Power Reclining Seatbacks" under Reclining Seatbacks on page 3‑5. Lumbar Adjustment Manual Lumbar To adjust a power seat, if equipped: . Move the control forward or rearward. If available, raise or lower the front or rear part of the seat cushion by moving the front or rear of the control up - 2012 GMC Sierra | Owner's Manual - Page 73
the safety belts cannot do their job. To adjust the power lumbar support, if equipped: . On vehicles with two-way lumbar, press and hold the top hold the front or rear of the control to increase or decrease lumbar support. The shoulder belt will not be against your body. Instead, it will - 2012 GMC Sierra | Owner's Manual - Page 74
pressure to the seatback, and the seatback will return to the upright position. 2. Push and pull on the seatback to make sure it is locked. Manual Reclining Seatbacks { WARNING If either seatback is not locked, it could move forward in a sudden stop or crash. That could cause injury to the person - 2012 GMC Sierra | Owner's Manual - Page 75
Seats and Restraints Power Reclining Seatbacks 3-7 Memory Seats Storing Memory Positions To save into memory: 1. Adjust the driver seat, seatback recliner, both outside mirrors, and the throttle and brake pedals, if equipped. See Power Mirrors on page 2‑15 and Adjustable Throttle and Brake Pedal - 2012 GMC Sierra | Owner's Manual - Page 76
may stop. Remove the obstruction; then press and hold the appropriate manual control for the memory item that is not recalling for two seconds. button. If the memory position is still not recalling, see your dealer for service. Easy Exit Driver Seat This feature can move the seat rearward to allow - 2012 GMC Sierra | Owner's Manual - Page 77
Seats and Restraints 3-9 Heated and Ventilated Front Seats { WARNING If you cannot feel temperature change or pain to the skin, the seat heater may cause burns even at low temperatures. To reduce the risk of burns, people with such a condition should use care when using the seat heater, - 2012 GMC Sierra | Owner's Manual - Page 78
on the heated seat buttons do not turn on during a remote start. The temperature performance of an unoccupied seat may be reduced. This is normal. See Remote Vehicle Start on page 2‑5. Rear Seats Rear Seats (Extended Cab Full Bench) Folding the Rear Seat Notice: Folding a rear seat with the safety - 2012 GMC Sierra | Owner's Manual - Page 79
Seats and Restraints To unfold the seat: 1. Push the seat cushion rearward while pulling the release strap under the seat cushion. Pull the seat cushion down until it latches. 2. Pull up on the seat cushion to make sure it is locked in place. Make sure the safety belts are not twisted or caught in - 2012 GMC Sierra | Owner's Manual - Page 80
worn properly, your strongest Safety Belts This section of the manual describes how to use safety belts properly. It also describes some things not to do with safety belts. Why Safety Belts Work { WARNING Do not let anyone ride where a safety belt cannot be worn - 2012 GMC Sierra | Owner's Manual - Page 81
much greater if you are belted. Q: If my vehicle has airbags, why should I have to wear safety belts? A: Airbags are supplemental systems only; so they work with safety belts - not instead of them. Whether or not an airbag is provided, all occupants still have to buckle up to get the most - 2012 GMC Sierra | Owner's Manual - Page 82
3-14 . Seats and Restraints Wear the lap part of the belt low and snug on the hips, belt properly. . which has a lap belt. See Lap Belt (Crew and Extended Cab) on page 3‑19 for more information. The following instructions explain how to wear a lap-shoulder belt properly. 1. Adjust the seat, if - 2012 GMC Sierra | Owner's Manual - Page 83
not long enough, see Safety Belt Extender on page 3‑20. If the belt stops before it reaches the buckle, when using the lap-shoulder belt in a rear center seating position of a crew-cab if necessary. 5. To make the lap part tight, pull up on the shoulder belt. - 2012 GMC Sierra | Owner's Manual - Page 84
Cab On the extended cab, push down on the release button (A) and move the height adjuster to the desired position. Regular and Crew Cab To move the adjuster down for the regular and crew cabs, squeeze the buttons (A) on the You can move the adjuster up just by pushing up on the shoulder belt guide - 2012 GMC Sierra | Owner's Manual - Page 85
without pushing the release button for extended cabs, to make sure it has locked into position. Pretensioners work only once. If the pretensioners activate in a crash, they will need to be replaced, and probably other new parts for the vehicle's safety belt system. See Replacing Safety Belt System - 2012 GMC Sierra | Owner's Manual - Page 86
The shoulder belt should go over the shoulder and across the chest. These parts of the body are best able to take belt restraining forces. 3. Be and it lies flat. The elastic cord must be under the belt and the guide on top. 4. Buckle, position, and release the safety belt as described previously - 2012 GMC Sierra | Owner's Manual - Page 87
Safety Belt Use During Pregnancy Safety belts work for everyone, including pregnant women. Like the key to making safety belts effective is wearing them properly. Lap Belt (Crew and Extended Cab) This section is only for the lap belt. To learn how to wear a lap- the lap part of a lap-shoulder belt. - 2012 GMC Sierra | Owner's Manual - Page 88
fit. The extender has been designed the instruction sheet that comes with the extender. working. See Safety Belt Reminders on page 5‑17. Keep safety belts clean and dry. See Safety Belt Care on page 3‑20 Belt Extender on page 3‑20. Make working properly. Look for any other loose or damaged safety - 2012 GMC Sierra | Owner's Manual - Page 89
Belt System Parts after a Crash { WARNING A crash can damage the safety belt system in the vehicle. A damaged safety belt system may not properly protect the person using it, resulting in serious injury or even death in a crash. To help make sure the safety belt systems are working properly after - 2012 GMC Sierra | Owner's Manual - Page 90
word AIRBAG will appear on the middle part of the steering wheel for the driver and on the instrument risk of injury from the force of an inflating bag, all airbags must inflate very quickly to do even if you have airbags. Airbags are designed to work with safety belts, but do not replace them. Also - 2012 GMC Sierra | Owner's Manual - Page 91
panel cluster, which shows the airbag symbol. The system checks the airbag electrical system for malfunctions. The light tells you if there is an electrical problem. See Airbag Readiness Light on page 5‑18 for more information. The driver airbag is in the middle of the steering - 2012 GMC Sierra | Owner's Manual - Page 92
3-24 Seats and Restraints The right front passenger airbag is in the instrument panel on the passenger side. Driver Side Shown, Passenger Side Similar If the vehicle has seat‐mounted side impact airbags for the driver and right front passenger, they are in the side of the seatbacks closest to the - 2012 GMC Sierra | Owner's Manual - Page 93
not put anything between an occupant and an airbag, and do not attach or put anything on the steering wheel hub or on or near any other airbag covering. Do not use seat accessories that block the inflation path of a seat-mounted side impact airbag. Never secure anything to the roof of - 2012 GMC Sierra | Owner's Manual - Page 94
position sensors which enable the sensing system to monitor the position of the driver seat (all models), and on crew cab and extended cab models the right front passenger seat on light duty models only. The seat position sensor provides information that is used to determine if the airbags should - 2012 GMC Sierra | Owner's Manual - Page 95
from the inflator. Gas from the inflator fills the airbag causing the bag to break out of the cover and deploy. The inflator, the airbag, and related hardware are all part of the airbag module. Frontal airbag modules are located inside the steering wheel and instrument panel. For vehicles with seat - 2012 GMC Sierra | Owner's Manual - Page 96
the doors, turn off the interior lamps and hazard warning flashers by using the controls for those features. The parts of the airbag that come may be dust in the air. This dust could cause breathing problems for people with a history of asthma or other breathing trouble. To avoid this, everyone - 2012 GMC Sierra | Owner's Manual - Page 97
Seats and Restraints other parts. The service manual for your vehicle covers the need to replace other parts. . 3-29 The Let only qualified technicians work on the airbag systems. Improper service can mean that an airbag system will not work properly. See your dealer for service. United States If - 2012 GMC Sierra | Owner's Manual - Page 98
3-30 Seats and Restraints from turning off the airbag and allowing the passenger, even if belted, to hit the instrument panel or windshield in a crash. Child age 1 to 12. A child age 1 to 12 must ride in the front seat because: . . My vehicle has no rear seat; Although children ages 1 to 12 ride - 2012 GMC Sierra | Owner's Manual - Page 99
come on in the passenger airbag status indicator located in the overhead console to let you know that the right front passenger airbag is off, (Continued) To help avoid injury to yourself or others, have the vehicle serviced right away. See Airbag Readiness Light on page 5‑18 for more information, - 2012 GMC Sierra | Owner's Manual - Page 100
by the passenger sensing system. The passenger sensing system works with sensors that are part of the right front passenger seat and safety belt. information. The passenger airbag status indicator will be visible on the overhead console when the vehicle is started. In addition, if the vehicle has - 2012 GMC Sierra | Owner's Manual - Page 101
present in a child restraint. A right front passenger takes his/her weight off of the seat for a period of time. Or, if there is a critical problem with the airbag system or the passenger sensing system. . { WARNING A child in a rear-facing child restraint can be seriously injured or killed if the - 2012 GMC Sierra | Owner's Manual - Page 102
stays on, it means that something may be wrong with the airbag system. To help avoid injury to yourself or others, have the vehicle serviced right away. See Airbag Readiness Light on page 5‑18 for more information, including important safety information. 3. Remove any additional items from the seat - 2012 GMC Sierra | Owner's Manual - Page 103
massagers. 3. Place the seatback in the fully upright position. 4. Have the person sit upright in the seat, centered on the seat cushion, with legs comfortably extended. 5. Restart the vehicle and have the person remain in this position for two to three minutes after the on indicator is lit. - 2012 GMC Sierra | Owner's Manual - Page 104
aftermarket briefcase, handbag, grocery bag, laptop or other electronic serviced. There are parts of the airbag system in several places around the vehicle. Your dealer and the service manual have information about servicing the vehicle and the airbag system. To purchase a service manual, see Service - 2012 GMC Sierra | Owner's Manual - Page 105
add things that change your vehicle's frame, bumper system, height, front end or side sheet metal, they may keep the airbag system from working properly. Changing or moving any parts of the front seats, safety belts, the airbag sensing and diagnostic module, steering wheel in this manual. See - 2012 GMC Sierra | Owner's Manual - Page 106
manual have information about the location of the airbag sensors, sensing and diagnostic module and airbag wiring. Where Are the Airbags? on page 3‑23. See your dealer for service. Q: What if I added a snow plow? Will it keep the airbags from working properly? A: We have designed our airbag systems - 2012 GMC Sierra | Owner's Manual - Page 107
work properly. Have the vehicle serviced right away. See Airbag Readiness Light on page 5‑18. 3-39 Child Restraints Older Children The manufacturer's instructions If no, try using the rear safety belt comfort guide. See "Rear Safety Belt Comfort Guides" under Lap-Shoulder Belt on page 3‑14 for - 2012 GMC Sierra | Owner's Manual - Page 108
. It should never be worn over the abdomen, which could cause severe or even fatal internal injuries in a crash. Also see "Rear Safety Belt Comfort Guides" under Lap-Shoulder Belt on page 3‑14. { WARNING Never allow more than one child to wear the same safety belt. The safety belt cannot properly - 2012 GMC Sierra | Owner's Manual - Page 109
Seats and Restraints WARNING (Continued) belt. The belt force would then be applied right on the abdomen. That could cause serious or fatal injuries. The shoulder belt should go over the shoulder and across the chest. 3-41 Infants and Young Children Everyone in a vehicle needs protection! This - 2012 GMC Sierra | Owner's Manual - Page 110
seat. If you must secure a forward-facing child restraint in the right front (Continued) Q: What are the different types of add-on child restraints? A: Add-on child restraints, which are purchased by the vehicle owner, are available in four basic types. Selection of a particular restraint should - 2012 GMC Sierra | Owner's Manual - Page 111
of child restraints, there are many different models available. When purchasing a child restraint, . The restraint manufacturer's instructions that come with the crash, infants need complete support. In a crash, if an infant can be distributed across the strongest part of an infant's body, the - 2012 GMC Sierra | Owner's Manual - Page 112
3-44 Seats and Restraints Child Restraint Systems Forward-Facing Child Seat Rear-Facing Infant Seat A rear-facing infant seat provides restraint with the seating surface against the back of the infant. The harness system holds the infant in place and, in a crash, acts to keep the infant - 2012 GMC Sierra | Owner's Manual - Page 113
is not properly secured in the vehicle. When securing an add-on child restraint, refer to the instructions that come with the restraint which may be on the restraint or in a booklet, or both, and to this manual. The child restraint instructions are important, so if they are not available, obtain - 2012 GMC Sierra | Owner's Manual - Page 114
enough, using safety belts. If a child restraint is secured in the right front passenger seat, and the vehicle has a switch in the glove box to manually turn off the right front passenger airbag, see Airbag On-Off Switch on page 3‑29 and Securing Child Restraints (Center Front Seat Position) on page - 2012 GMC Sierra | Owner's Manual - Page 115
properly installed using the anchors, or use the vehicle's safety belts to secure the restraint, following the instructions that came with that restraint, and also the instructions in this manual. When installing a child restraint with a top tether, you must also use either the lower anchors or the - 2012 GMC Sierra | Owner's Manual - Page 116
the law requires that forward-facing child restraints have a top tether, and that the tether be attached. Be sure to read and follow the instructions for your child restraint. Lower Anchors Lower anchors (A) are metal bars built into the vehicle. There are two lower anchors for each LATCH seating - 2012 GMC Sierra | Owner's Manual - Page 117
3‑55 for more information. Seating positions with top tether anchors. j (Lower Anchor): Seating positions with two lower anchors. For crew and extended cab models, the rear outboard seating positions have exposed metal lower anchors located in the crease between the seatback and the seat cushion. - 2012 GMC Sierra | Owner's Manual - Page 118
an anchor located on the same side of the vehicle as the seating position where the child restraint will be placed. Crew Cab Shown, Extended Cab Similar For crew and extended cab models, the top tether anchors are the loops located near the top of the seatback for each rear seating position. These - 2012 GMC Sierra | Owner's Manual - Page 119
to a single anchor, except for the center top tether anchors in the crew and extended cabs. Attaching more than one child restraint to a single anchor could cause the anchor or secure the restraint, following the instructions that came with the child restraint and the instructions in this manual. - 2012 GMC Sierra | Owner's Manual - Page 120
's safety belts. This may damage these parts. If necessary, move buckled safety belts to stowed position, before folding the seat. Regular Cab Models 1. If the child restraint manufacturer recommends according to your child restraint instructions and the following instructions: If the position you - 2012 GMC Sierra | Owner's Manual - Page 121
cm (1 in) of movement for proper installation. 3-53 Crew and Extended Cab Models 1. Attach and tighten the lower attachments to the lower anchors. If the belts. Refer to your child restraint manufacturer instructions and the instructions in this manual. 1.1. Find the lower anchors for the desired - 2012 GMC Sierra | Owner's Manual - Page 122
tether be attached, attach and tighten the top tether to the top tether anchor (loop), if your vehicle has one. Refer to the child restraint instructions and the following steps: Example - Rear Driver Side Position 2.1. When using a child restraint with a top tether in the rear driver side position - 2012 GMC Sierra | Owner's Manual - Page 123
Continued) To help make sure the LATCH system is working properly after a crash, see your dealer to have during a crash, new LATCH system parts may be needed. New parts and repairs may be necessary even and as the child restraint manufacturer's instructions say. Securing Child Restraints (Rear Seat - 2012 GMC Sierra | Owner's Manual - Page 124
plate, and run the lap and shoulder portions of the vehicle's safety belt through or around the restraint. The child restraint instructions will show you how. For crew cab second row seatings positions, tilt the latch plate to adjust the belt if needed. If the child restraint has the LATCH system - 2012 GMC Sierra | Owner's Manual - Page 125
Seats and Restraints 3-57 3. Push the latch plate into the buckle until it clicks. Position the release button on the buckle so that the safety belt could be quickly unbuckled if necessary. 4. Pull the shoulder belt all the way out of the retractor to set the lock. When the retractor lock is set, - 2012 GMC Sierra | Owner's Manual - Page 126
3-58 Seats and Restraints 6. If the child restraint has a top tether, follow the child restraint manufacturer's instructions regarding the use of the top tether. See Lower Anchors and Tethers for Children (LATCH System) on page 3‑47 for more information. 7. Before placing a child - 2012 GMC Sierra | Owner's Manual - Page 127
secure a child seat in a position without a top tether anchor if a national or local law requires that the top tether be anchored, or if the instructions that come with the child restraint say that the top strap must be anchored. In Canada, the law requires that forward-facing child restraints have - 2012 GMC Sierra | Owner's Manual - Page 128
. 3. Pick up the latch plate, and run the lap and shoulder portions of the vehicle's safety belt through or around the restraint. The child restraint instructions will show you how. 4. Push the latch plate into the buckle until it clicks. Position the release button so that the safety belt could be - 2012 GMC Sierra | Owner's Manual - Page 129
Steps 5 and 6. 7. If the vehicle does not have a rear seat and the child restraint has a top tether, follow the child restraint manufacturer's instructions regarding the use of the top tether. See Lower Anchors and Tethers for Children (LATCH System) on page 3‑47 for more information. 8. Before - 2012 GMC Sierra | Owner's Manual - Page 130
3-62 Seats and Restraints With Airbag Off Switch This vehicle has airbags. A rear seat is a safer place to secure a forward-facing child restraint. See Where to Put the Restraint on page 3‑45. There may be a switch in the glove box that you can use to turn off the right front passenger frontal - 2012 GMC Sierra | Owner's Manual - Page 131
To help avoid injury to yourself or others, have the vehicle serviced right away. See Airbag Readiness Light on page 5‑18 for using the lap-shoulder belt to secure the child restraint in this position. Follow the instructions that came with the child restraint. 1. Move the seat as far back as it - 2012 GMC Sierra | Owner's Manual - Page 132
3-64 Seats and Restraints 4. Push the latch plate into the buckle until it clicks. Position the release button so that the safety belt could be quickly unbuckled if necessary. 5. Pull the shoulder belt all the way out of the retractor to set the lock. When the retractor lock is set, the belt can - 2012 GMC Sierra | Owner's Manual - Page 133
your child restraint has a top tether, follow the child restraint manufacturer's instructions regarding the use of the top tether. See Lower Anchors and Tethers installed in the vehicle, even if the airbag is off. Heavy Duty Crew Cab Only This vehicle has airbags. A rear seat is a safer place to - 2012 GMC Sierra | Owner's Manual - Page 134
. 3. Pick up the latch plate, and run the lap and shoulder portions of the vehicle's safety belt through or around the restraint. The child restraint instructions will show you how. 4. Push the latch plate into the buckle until it clicks. Make sure the release button is positioned so you would be - 2012 GMC Sierra | Owner's Manual - Page 135
Seats and Restraints 3-67 7. If your child restraint has a top tether, follow the child restraint manufacturer's instructions regarding the use of the top tether. See Lower Anchors and Tethers for Children (LATCH System) on page 3‑47 for more information. 8. Before placing a child - 2012 GMC Sierra | Owner's Manual - Page 136
3-68 Seats and Restraints 2 NOTES - 2012 GMC Sierra | Owner's Manual - Page 137
above the glove box. Glove Box Lift up on the glove box lever to open it. Cupholders If equipped, there are cupholders on the center console and the rear of the center console, also in the rear seat armrest. Pull the cover down on the rear of the center - 2012 GMC Sierra | Owner's Manual - Page 138
Storage Vehicles with an upper and lower center console storage area have cupholders included. Pull the lever (A) up to access the upper storage area. Raise the upper storage bin, then pull the lever (B) up - 2012 GMC Sierra | Owner's Manual - Page 139
System Light ...5-22 Malfunction Indicator Lamp ...5-22 Brake System Warning Light ...5-25 Antilock Brake System (ABS) Warning Light ...5-26 Four-Wheel-Drive Light ...5-26 Tow/Haul Mode Light ...5-26 StabiliTrak® OFF Light ...5-27 Traction Control System (TCS)/StabiliTrak® Light ...5-27 Tire - 2012 GMC Sierra | Owner's Manual - Page 140
the lower left side of the steering column. To adjust the steering wheel: 1. Hold the steering wheel and pull the lever. 2. Move the steering wheel up or down. If equipped, some audio controls can be adjusted at the steering wheel. w (Next): Press to go to the next favorite radio station, track on - 2012 GMC Sierra | Owner's Manual - Page 141
next or previous track. Selecting Tracks on an iPod or USB Device (Vehicles without a Navigation System) 1. Press and hold w or c / x while listening to a song until the contents of the current folder display on the radio display. 2. Press and release w or c / x to scroll up or down the list, then - 2012 GMC Sierra | Owner's Manual - Page 142
to initiate voice recognition. See "Voice Recognition" in the Navigation System manual for more information. While listening to a CD/DVD, press and hold Horn To sound the horn, press the center pad on the steering wheel. Windshield Wiper/Washer The front wiper control is located on the turn and - 2012 GMC Sierra | Owner's Manual - Page 143
Instruments and Controls 5-5 8 (Mist): For a single wipe, turn to 8, then release. For several wipes, hold the band on 8 longer. 9 (Off): Turns the windshield wipers off. Windshield Washer { WARNING In freezing weather, do not use the washer until the windshield is warmed. Otherwise the washer - 2012 GMC Sierra | Owner's Manual - Page 144
is displayed. 5. If calibration is necessary, calibrate the compass. See "Compass Calibration Procedure" following. Compass Calibration The compass can be manually calibrated. Only calibrate the compass in a magnetically clean and safe location, such as an open parking lot, where driving the vehicle - 2012 GMC Sierra | Owner's Manual - Page 145
return to the previous menu. 5-7 Clock AM-FM Radio and AM‐FM Radio with CD Player To set the clock: 1. Turn the ignition key to ACC/ ACCESSORY or ON/RUN, then press the O button to turn the radio on. 2. Press the H button until the hour numbers begin to flash, then turn the - 2012 GMC Sierra | Owner's Manual - Page 146
screen time out. ... MP3 Radios with a Single CD or a Single CD and DVD Player To adjust the time and date: 1. Turn the ignition key to ACC/ ACCESSORY or ON/RUN, then press the O button to turn the radio on. 2. Press the H button to display HR, MIN, MM, DD, YYYY (hour, minute, month - 2012 GMC Sierra | Owner's Manual - Page 147
cigarette lighter. The cigarette lighter is designed to fit only in the receptacle closest to the driver. There may be another accessory power outlet in the rear cargo area. If the vehicle has a floor console, there is an accessory power outlet inside the storage bin and one on the rear of the floor - 2012 GMC Sierra | Owner's Manual - Page 148
accessory power outlet and could overload vehicle or adapter fuses. If a problem is experienced, see your dealer. When adding electrical equipment, be sure to follow the proper installation instructions included with the equipment. See Add equipment plugged in for an extended period of time while the - 2012 GMC Sierra | Owner's Manual - Page 149
. Often gauges and warning lights work together to indicate a problem with the vehicle. When one of the warning lights comes on and stays on while driving, or when one of the gauges shows there may be a problem, check the section that explains what to do. Follow this manual's advice. Waiting to do - 2012 GMC Sierra | Owner's Manual - Page 150
5-12 Instruments and Controls Instrument Cluster English Light Duty Premium Shown. Metric, Uplevel, Base and Heavy Duty Similar. - 2012 GMC Sierra | Owner's Manual - Page 151
Instruments and Controls For vehicles with a DURAMAX® Diesel engine, see the DURAMAX® Diesel Supplement for more information. For vehicles with a Hybrid, see the Hybrid Supplement for more information. The hour meter displays for up to 30 seconds, or until the ignition is turned on. See Driver - 2012 GMC Sierra | Owner's Manual - Page 152
Here are some situations owners can experience with the fuel gauge. None of these indicate a problem with the fuel gauge... Fuel Gauge It takes a little more or less fuel to fill for more information. Metric At the gas station, the fuel pump shuts off before the gauge reads full. English - 2012 GMC Sierra | Owner's Manual - Page 153
a dangerously low oil level or some other problem causing low oil pressure. Check the vehicle as soon as possible. Add oil if required, but if the oil is still low, have the vehicle serviced. Always follow the maintenance schedule for or psi (pounds per square inch) when the engine is running. - 2012 GMC Sierra | Owner's Manual - Page 154
Coolant Temperature Gauge Voltmeter Gauge English This gauge shows the engine coolant temperature. It also provides an indicator of how hard the vehicle is working. During a majority of the operation, the gauge reads 100°C (210°F) or less. If pulling a load or going up hills, it is normal for the - 2012 GMC Sierra | Owner's Manual - Page 155
number of electrical accessories are operating in the vehicle and the engine is left idling for an extended period. This accessories, such as the radio and air conditioner. Readings outside the normal operating range indicate a possible problem in the electrical system. Have the vehicle serviced - 2012 GMC Sierra | Owner's Manual - Page 156
on the seat such as a briefcase, handbag, grocery bag, laptop, or other electronic device. To turn off on it indicates there is an electrical problem. The system check includes the airbag driving, it means the airbag system might not be working properly. The airbags in the vehicle might not inflate - 2012 GMC Sierra | Owner's Manual - Page 157
is a problem with the airbag it also has a passenger airbag status indicator located in the overhead console. Canada and Mexico When the vehicle is started, the passenger passenger frontal airbag. When the right front passenger airbag is manually turned off using the airbag on-off switch in the - 2012 GMC Sierra | Owner's Manual - Page 158
5-20 Instruments and Controls { WARNING If the right front passenger airbag is on-off switch is turned off. To help avoid injury to yourself or others, have the vehicle serviced right away. See Airbag Readiness Light on page 5‑18 for more information, including important safety information. - 2012 GMC Sierra | Owner's Manual - Page 159
no lights at all, there may be a problem with the lights or the airbag on-off switch. See your dealer for service. In addition, if the vehicle has a page 3‑29. The passenger airbag status indicator is on the overhead console. See Passenger Sensing System on page 3‑32 for important safety information. - 2012 GMC Sierra | Owner's Manual - Page 160
problem with the lights or the passenger sensing system. See your dealer for service. Charging System Light checked right away. If the vehicle must be driven a short distance with the light on, turn off accessories, such as the radio and air is working. If it does not, have the vehicle serviced by - 2012 GMC Sierra | Owner's Manual - Page 161
intake, or fuel system of the vehicle or the replacement of the original tires with other than those of the same Tire Performance Inspection/ Maintenance test. See Accessories and Modifications on page problem and service is required. Malfunctions often are indicated by the system before any problem - 2012 GMC Sierra | Owner's Manual - Page 162
. The dealer has the proper test equipment and diagnostic tools to fix any mechanical or electrical problems that might have developed. The DLC is under the instrument panel to the left of the steering wheel. See your dealer if assistance is needed. The vehicle may not pass inspection if: . The - 2012 GMC Sierra | Owner's Manual - Page 163
working, the remaining circuit can still work to stop the vehicle. For normal braking performance, both circuits need to be working. If the warning light comes on and a chime sounds there could be a brake problem is still on, have the vehicle towed for service. See Towing the Vehicle on page 10‑93. - 2012 GMC Sierra | Owner's Manual - Page 164
is a problem with the regular serviced by your dealer. If the system is working Wheel-Drive Light For vehicles with the Tow/Haul Mode feature, this light comes on when the Tow/Haul Mode has been activated. For vehicles equipped with the four-wheel-drive light, it comes on when a vehicle with a manual - 2012 GMC Sierra | Owner's Manual - Page 165
light comes on briefly when the engine is started. If the light does not come on or stays on, have the vehicle serviced by the dealer. If the system is working normally, the indicator light turns off. For vehicles with the Tire Pressure Monitor System (TPMS), this light comes on briefly when - 2012 GMC Sierra | Owner's Manual - Page 166
low on oil and it might have some other system problem. If the vehicle is a hybrid, see the hybrid the oil level as soon as possible. Add oil if required, but if the oil level is does not, have the vehicle serviced by your dealer. If the system is working normally the indicator light then goes - 2012 GMC Sierra | Owner's Manual - Page 167
should go off. If it does not, have the vehicle serviced by your dealer. This light is also used to indicate working normally, the indicator light turns off. If it does not come on, have the vehicle serviced by your dealer. If the light stays on and the engine does not start, there could be a problem - 2012 GMC Sierra | Owner's Manual - Page 168
the DIC buttons located on the instrument panel, next to the steering wheel. If the vehicle does not have DIC buttons, the trip odometer reset trip, fuel, and vehicle system information, and warning messages if a system problem is detected. The DIC also allows some features to be customized. See - 2012 GMC Sierra | Owner's Manual - Page 169
Instruments and Controls DIC Buttons The temperature will be shown in °C or °F depending on the units selected. Press this button to display the oil life, units, tire pressure readings for vehicles with the Tire Pressure Monitor System (TPMS), trailer brake gain and output information for vehicles - 2012 GMC Sierra | Owner's Manual - Page 170
the trip/fuel button until FUEL USED displays. This display shows the number of liters (L) or gallons (gal) of fuel used since the last reset of this . Once the vehicle begins moving, the trip odometer will accumulate mileage. For example, if the vehicle was driven 8 km (5 miles) before it - 2012 GMC Sierra | Owner's Manual - Page 171
the current fuel economy at a particular moment and will change frequently as driving conditions change. This display shows the instantaneous fuel economy in liters per 100 kilometers (L/100 km) or miles per gallon (mpg). Unlike average economy, this screen cannot be reset. 5-33 An Active Fuel - 2012 GMC Sierra | Owner's Manual - Page 172
either kilopascals (kPa) or pounds per square inch (psi). Press the vehicle information button until the system while driving, a message advising you to add pressure in a specific tire will appear in the display a problem with the vehicle. If this consistently occurs, see your dealer for service. - 2012 GMC Sierra | Owner's Manual - Page 173
this information on the DIC. This is normal. Oil Pressure This display shows the oil pressure in either kilopascals (kPa) or pounds per square inch (psi). Engine Hours Press the vehicle information button until ENGINE HOURS displays. This display shows the total number of hours the engine has run - 2012 GMC Sierra | Owner's Manual - Page 174
the choice. Engine Hours To display the ENGINE HOURS, place the ignition in LOCK/OFF or ACC/ACCESSORY, then press and hold the trip odometer reset stem for four seconds while viewing the ODOMETER. vehicle begins moving, the trip odometer will accumulate mileage. For example, if the vehicle was driven - 2012 GMC Sierra | Owner's Manual - Page 175
miles (mi) driven since the ignition was last turned on and the vehicle was moving. Once the vehicle begins moving, the trip odometer will accumulate mileage. For example, if the vehicle was driven 8 km (5 miles) before it is started again, and then the retro-active reset feature is activated, the - 2012 GMC Sierra | Owner's Manual - Page 176
10‑7. In addition to the engine oil life system monitoring the oil life, additional maintenance is recommended in the Maintenance Schedule in this manual. See Maintenance Schedule on page 11‑3 for more information. Trailer Gain and Output On vehicles with the Integrated Trailer Brake Control (ITBC - 2012 GMC Sierra | Owner's Manual - Page 177
odometer reset stem. The messages that require immediate action cannot be cleared until that action is performed. All messages should be taken seriously and clearing the message does not correct the problem. The following are the possible messages and some information about them. If the vehicle has - 2012 GMC Sierra | Owner's Manual - Page 178
instrument panel cluster. See Charging System Light on page 5‑22. Driving with this problem could drain the battery. Turn off all unnecessary accessories. Have the electrical system checked as soon as possible. See your dealer. SERVICE BRAKES SOON On some vehicles, this message displays if there is - 2012 GMC Sierra | Owner's Manual - Page 179
5-41 ENGINE HOT A/C (Air Conditioning) TURNED OFF This air conditioning compressor turns back on. You can continue to drive your vehicle. If this message continues to appear, have the system repaired by your dealer as soon as possible to avoid damage to the engine. RIGHT REAR DOOR OPEN (Crew Cab - 2012 GMC Sierra | Owner's Manual - Page 180
been corrected. Check the oil as soon as possible and have the vehicle serviced by your dealer. See Engine Oil on page 10‑7. See Overheated Engine message is on, but there is no reduction in performance, proceed to your destination. The performance may OIL PRESSURE LOW STOP ENGINE Notice: If you - 2012 GMC Sierra | Owner's Manual - Page 181
on, the vehicle should be taken to your dealer for service as soon as possible. has been left off or improperly Messages PARK ASST BLOCKED SEE OWNERS MANUAL This message displays if there is see Ultrasonic Parking Assist on page 9‑61. TIGHTEN GAS CAP This message may display along with the check - 2012 GMC Sierra | Owner's Manual - Page 182
the engine for at least 15 seconds; then start the engine again. If this message still comes on, it means there is a problem. You should see your dealer for service. The vehicle is safe to drive; however, you do not have the benefit of StabiliTrak, so reduce your speed and drive accordingly - 2012 GMC Sierra | Owner's Manual - Page 183
to driving conditions. The message displays if an engine or vehicle related problem has been detected and the vehicle needs service. See your dealer. Airbag System Messages SERVICE AIR BAG This message displays if there is a problem with the airbag system. Have your dealer inspect the system for - 2012 GMC Sierra | Owner's Manual - Page 184
problem with the TPMS. See your dealer. Transmission Messages SERVICE 4 WHEEL DRIVE If the vehicle has four-wheel drive, this message may display if a problem occurs with the four-wheel on page 10‑58 for more information. TIRE LOW ADD AIR TO TIRE If the vehicle has the Tire Pressure Monitor - 2012 GMC Sierra | Owner's Manual - Page 185
trailer is reconnected. This message also clears if you acknowledge it. If this message still displays, either the vehicle or the trailer needs service. See your dealer. See "Integrated Trailer Brake Control System" under Towing Equipment on page 9‑94 for more information. ICE POSSIBLE DRIVE WITH - 2012 GMC Sierra | Owner's Manual - Page 186
, turn the headlamps off. 2. Press the customization button to scroll through the available customizable options. Washer Fluid Messages WASHER FLUID LOW ADD FLUID This message displays when the windshield washer fluid is low. Fill the windshield washer fluid reservoir as soon as possible. See - 2012 GMC Sierra | Owner's Manual - Page 187
Instruments and Controls Press the customization button until the PRESS V TO DISPLAY IN ENGLISH screen appears on the DIC display. Press the set/reset button once to display all DIC messages in English. DISPLAY LANGUAGE This feature allows you to select the language in which the DIC messages will - 2012 GMC Sierra | Owner's Manual - Page 188
5-50 Instruments and Controls To select a setting, press the set/ reset button while the desired setting is displayed on the DIC. REMOTE DOOR LOCK This feature allows you to select the type of feedback received when locking the vehicle with the Remote Keyless Entry (RKE) transmitter. You will not - 2012 GMC Sierra | Owner's Manual - Page 189
setting is displayed on the DIC. DELAY DOOR LOCK On vehicles with a crew cab, this feature turns the delayed door locks on or off. When locking the doors The key must be out of the ignition for this feature to work. You can temporarily override delayed locking by pressing the power door lock switch - 2012 GMC Sierra | Owner's Manual - Page 190
dark enough outside, the exterior lights will turn on briefly when you unlock the vehicle with the RKE transmitter. The lights will remain on for 20 seconds, until the lock button on the RKE transmitter is pressed, or until the vehicle is no longer off. See Remote Keyless Entry (RKE) System - 2012 GMC Sierra | Owner's Manual - Page 191
Instruments and Controls To select a setting, press the set/ reset button while the desired setting is displayed on the DIC. PARK TILT MIRRORS If the vehicle has this feature, it allows you to select if the outside mirror(s) will automatically tilt down when the vehicle is shifted into R (Reverse). - 2012 GMC Sierra | Owner's Manual - Page 192
5-54 Instruments and Controls NO CHANGE: No change will be made to this feature. The current setting will remain. To select a setting, press the set/ reset button while the desired setting is displayed on the DIC. MEMORY SEAT RECALL If the vehicle has this feature, it allows you to select your - 2012 GMC Sierra | Owner's Manual - Page 193
Instruments and Controls Press the customization button until REMOTE START appears on the DIC display. Press the set/reset button once to access the settings for this feature. Then press the customization button to scroll through the following settings: OFF: The remote start feature will be disabled - 2012 GMC Sierra | Owner's Manual - Page 194
feature. This includes any garage door opener model manufactured before April 1, 1982. Read the instructions completely before attempting to program the transmitter System See Radio Frequency Statement on page 13‑20 for information regarding Part 15 of the Federal Communications Commission (FCC) - 2012 GMC Sierra | Owner's Manual - Page 195
should slowly blink. This button may need to be held for up to 20 seconds. 4. Immediately, within one second, release the button when the garage door opener. If these instructions do not work, the garage door opener is probably a Fixed Code unit. Follow the programming instructions that follow for a - 2012 GMC Sierra | Owner's Manual - Page 196
5-58 Instruments and Controls garage door opener is a Fixed Code unit. If you do not see a row of dip switches, return to the previous section for Programming Universal Home Remote - Rolling Code. Your hand-held transmitter can have between 8 to 12 dip switches depending on the brand of transmitter - 2012 GMC Sierra | Owner's Manual - Page 197
Instruments and Controls The switch positions on the hand-held transmitter could be labeled as follows: . . 5-59 If a switch is set between the up and down position, write "Middle." The switch settings written down in Step 2 now become the button strokes to be entered into the Universal Home - 2012 GMC Sierra | Owner's Manual - Page 198
5-60 Instruments and Controls 5. After entering all of the switch positions, once again firmly press and release all three buttons at the same time. The indicator lights will turn on. 6. Press and hold the button that will be used to control the garage door until the garage door moves. The - 2012 GMC Sierra | Owner's Manual - Page 199
Universal Home Remote device: 1. Press and hold the two outside buttons at the same time for approximately 20 seconds, until the indicator lights, located directly above the buttons, begin to blink rapidly. 2. Once Buttons Any of the three buttons can be reprogrammed by repeating the instructions. - 2012 GMC Sierra | Owner's Manual - Page 200
5-62 Instruments and Controls 2 NOTES - 2012 GMC Sierra | Owner's Manual - Page 201
Signals ...6-5 Fog Lamps ...6-6 Auxiliary Roof-Mounted Lamp ...6-6 Interior Lighting Instrument Panel Illumination Control ...Cargo Lamp ...Dome Lamps is located on the instrument panel to the left of the steering wheel. It controls the following systems: ... Headlamps Taillamps Parking Lamps - 2012 GMC Sierra | Owner's Manual - Page 202
on. For vehicles first sold in Canada, the off position will only work when the vehicle is shifted into P (Park). AUTO (Automatic): Automatically with a radio, a reminder chime sounds when the headlamps or parking lamps are manually turned on, the ignition is off, and a door is open. To disable - 2012 GMC Sierra | Owner's Manual - Page 203
: . . Flash-to-Pass This feature lets you use the high-beam headlamps to signal a driver in front of you that you want to pass. It works even if the headlamps are in the automatic position. The ignition is on. The exterior lamps control is in AUTO. - 2012 GMC Sierra | Owner's Manual - Page 204
6-4 Lighting headlamp system are only affected when the light sensor detects a change in lighting lasting longer than the delay. If the vehicle is started in a dark garage, the automatic headlamp system comes on immediately. Once the vehicle leaves the garage, it takes approximately one minute for - 2012 GMC Sierra | Owner's Manual - Page 205
light remains on for 10 minutes with the driver door closed. See Retained Accessory Power (RAP) on page 9‑29. The regular headlamp system can be you are having trouble. Press again to turn the flashers off. When the hazard warning flashers are on, the vehicle's turn signals will not work. An arrow - 2012 GMC Sierra | Owner's Manual - Page 206
the fog lamps to come on. Auxiliary Roof-Mounted Lamp If the vehicle has this feature, this button includes wiring provisions for a dealer or a qualified service center to install an auxiliary roof lamp. - 2012 GMC Sierra | Owner's Manual - Page 207
located above the overhead console, a dark green switched power wire and a black ground wire. This button is located on the overhead console. When the wiring snow plow prep package. For further information, see Adding a Snow Plow or Similar Equipment on page 9‑106. 6-7 Interior Lighting Instrument - 2012 GMC Sierra | Owner's Manual - Page 208
reading lamps, they are located on the overhead console. To turn on the reading lamps, press the button, clockwise to the farthest position to manually turn on the dome lamps. The dome is opened. Press the button again to return it to the extended position so that the dome lamps come on when a door - 2012 GMC Sierra | Owner's Manual - Page 209
voltage for best performance and extended life of the battery is normal. If there is a problem, an alert will be displayed. into accessory power outlets. EPM works to accessories. Exit Lighting The interior lamps come on when the key is removed from the ignition. They turn off automatically in 20 - 2012 GMC Sierra | Owner's Manual - Page 210
and reading lamps, if they are left on for more than 10 minutes after the ignition is turned off. The cargo lamp shuts off after 20 minutes. This prevents the battery from running down. - 2012 GMC Sierra | Owner's Manual - Page 211
Agreements Trademarks and License Agreements ...7-55 { WARNING Taking your eyes off the road for extended periods could cause a crash resulting in injury or death to you or others. Do not give extended attention to infotainment tasks while driving. This system provides access to many audio and non - 2012 GMC Sierra | Owner's Manual - Page 212
covering mobile radio and telephone equipment. The vehicle has Retained Accessory Power (RAP). With RAP, the audio system can be played even For vehicles with a navigation radio system, see the separate Navigation System Manual. Become familiar with the operation and controls of the audio system. - 2012 GMC Sierra | Owner's Manual - Page 213
Infotainment System 7-3 Operation AM-FM Radio - 2012 GMC Sierra | Owner's Manual - Page 214
7-4 Infotainment System Radio with CD (MP3) Shown; Radio with USB and CD (MP3), Radio with USB and Six-Disc CD (MP3), and Radio with CD Similar - 2012 GMC Sierra | Owner's Manual - Page 215
Infotainment System 7-5 System on page 7‑37 for more information on the vehicle's RSE system. The DVD player is the top slot on the radio faceplate. The player is capable of reading the DTS‐programmed DVD Audio or DVD Video media. (DTS and DTS Digital Surround are registered trademarks of Digital - 2012 GMC Sierra | Owner's Manual - Page 216
to display additional text information related to the current FM-RDS or XM station; or CD, MP3, or WMA song. If information is available during XM, CD, MP3, or WMA playback, the song title information displays on the top line of the display and artist information displays on the bottom line. When - 2012 GMC Sierra | Owner's Manual - Page 217
and treble settings. Unique EQ settings can be saved for each source. If the radio has a Bose® audio system, the EQ settings are either MANUAL or TALK. . . Setting the Tone (Bass/ Midrange/Treble) (All Except AM-FM Radio and Radio with CD) BASS/MID/TREB (Bass, Midrange, or Treble): To - 2012 GMC Sierra | Owner's Manual - Page 218
for the vehicle and it must be returned to your dealer for service. Locked or Loc: One of these messages will display when the THEFTLOCK® system has locked up the radio. Take the vehicle to your dealer for service. If any error occurs repeatedly or if an error cannot be corrected, contact your - 2012 GMC Sierra | Owner's Manual - Page 219
incorrect information that causes the radio features to work improperly. If this happens, contact the radio between AM, FM, or XM™, if equipped. f (Tune): Turn to manually select radio stations. © SEEK: Press to seek the previous radio station. song title information displays on the top line of the - 2012 GMC Sierra | Owner's Manual - Page 220
the radio station while the vehicle is parked; see Defensive Driving on page 9‑3. Tune to stored radio stations using the presets, favorites button, and steering wheel controls, if the vehicle has this feature. Radios that have a FAV button store radio stations as favorites. Up to 36 stations can be - 2012 GMC Sierra | Owner's Manual - Page 221
commercial-free music, coast to coast, and in digital-quality sound. A service fee is required to receive the XM service. If the service FM, or XM™, if equipped. f (Tune): Turn to manually select an XM channel. © SEEK: ¨ SEEK: s If information is available, the song title information displays on the - 2012 GMC Sierra | Owner's Manual - Page 222
Tune to stored radio stations using the presets, favorites button, and steering wheel controls, if the vehicle has this feature. Up to 36 stations or removed while the vehicle is moving faster than 8 km/h (5 mph). To add or remove a category: 1. Press the MENU button. 2. Press the softkey located - 2012 GMC Sierra | Owner's Manual - Page 223
Air: This channel is not currently in service . Tune in to another channel. Channel Unauth: This channel is blocked or cannot be received with your XM subscription package working properly. No Title Info: No song title information is available at this time on this channel. The system is working - 2012 GMC Sierra | Owner's Manual - Page 224
item from the accessory power outlet. Unknown Consult with your dealer. XM™ Satellite Radio Service XM Satellite Radio Service gives digital radio reception from coast to coast radio has a built-in electronic circuit that automatically works to reduce interference, some static can occur, especially - 2012 GMC Sierra | Owner's Manual - Page 225
hand until fully seated plus one quarter turn. Audio Players CD Player Care of the CD Player Do not add any label to a CD. It could get caught in the CD. If a CD is recorded on . If the vehicle has a sunroof, the performance of the XM system (if equipped) may be affected if the sunroof is open. - 2012 GMC Sierra | Owner's Manual - Page 226
7-16 Infotainment System 3. Load a CD. Insert the CD partway into the slot, label side up. The player pulls the CD in. To insert multiple CDs: 1. Press and hold the LOAD button for two seconds. A beep sounds and Load All Discs displays. 2. Wait for the message on when to insert the discs. The CD - 2012 GMC Sierra | Owner's Manual - Page 227
times, to continue moving forward through the tracks on the CD. 4 (Information): Press to display additional text information related to the current song. If information is available, the song title information s REV (Fast Reverse): Press and hold to reverse playback quickly within a track. - 2012 GMC Sierra | Owner's Manual - Page 228
skipped, and the player advances to the next folder that contains files. Order of Play Compressed audio files are accessed in the following order: ... MP3‐Supported Files The Radio with CD (MP3), Radio with USB and CD (MP3), and Radio with USB and Six-Disc CD (MP3) have the capability of - 2012 GMC Sierra | Owner's Manual - Page 229
than 32 characters or 4 pages are shortened. The display does not show parts of words on the last page of text and the extension of the file folders containing compressed audio song files. Playlists that have an .m3u or .pls file extension and are stored on a USB device may be supported by the radio - 2012 GMC Sierra | Owner's Manual - Page 230
7-20 Infotainment System RDM (Random): Press to listen to tracks in random, rather order by artist. The current artist playing is shown on the second line of the display. Once all songs by that artist are played, the player moves to the next artist in alphabetical order and begins playing files - 2012 GMC Sierra | Owner's Manual - Page 231
arrows, and songs from the current album begin to play. Once all songs from that The air is very humid. If so, wait about an hour and try again. There was a problem while burning the CD. The label is caught in the CD player. . CD/DVD Player Care of the CD and DVD Player Do not add - 2012 GMC Sierra | Owner's Manual - Page 232
7-22 Infotainment System Store CD-Rs or CD-RWs in their original cases or other protective cases and away from direct sunlight and dust. The CD or DVD player scans the bottom surface of the disc. If the surface of a disc is damaged, such as cracked, broken, or scratched, the disc does not play - 2012 GMC Sierra | Owner's Manual - Page 233
. The player pulls it in and the disc should begin playing. (Loading a disc into the system, depending on media type and format, ranges from 5 to 20 seconds for a CD, and up to 30 seconds for a DVD to begin playing.) Press and release to eject the disc that is currently playing in - 2012 GMC Sierra | Owner's Manual - Page 234
¨ SEEK: track. Press to go to the next 4 (Information): Press to display additional text information related to the current song. If information is available, the song title information displays on the top line of the display and artist information displays on the bottom line. When information is - 2012 GMC Sierra | Owner's Manual - Page 235
MP3/WMA files. Press the CAT (category) button to toggle between uncompressed audio and MP3/WMA files. CD‐R or CD‐RW Supported File and Folder Structure The DVD player supports: ... 7-25 Root Directory The root directory of the disc is treated as a folder. If the root directory has compressed audio - 2012 GMC Sierra | Owner's Manual - Page 236
be edited using the radio. These playlists are treated as special folders containing compressed audio song files. Playlists that have an .m3u or .pls file extension and are stored on a USB device may be supported by the radio with a USB port. When play enters a new folder, the display does not - 2012 GMC Sierra | Owner's Manual - Page 237
finished, the disc begins playing files in order by artist. The current artist playing is shown on the second line of the display. Once all songs by that artist are played, the player moves to the next artist in alphabetical order and begins playing files by that artist. S c (Previous Folder - 2012 GMC Sierra | Owner's Manual - Page 238
softkey or by the rear seat passenger using the remote control. Loading a disc into the system, depending on media type and format, ranges from 5 to 20 seconds for a CD, and up to 30 seconds for a DVD. Press and release to eject the disc currently playing in the top slot. A beep sounds - 2012 GMC Sierra | Owner's Manual - Page 239
previews. Press to fast forward the CD or DVD at five times the normal speed. To stop fast forwarding, press again. This button might not work when the DVD is playing the copyright information or the previews. Using Softkeys to Play a DVD-V (Video) Once a DVD-V is inserted, the radio display menu - 2012 GMC Sierra | Owner's Manual - Page 240
radio. If the DVD still does not play, refer to the on-screen instructions, if available. y (Menu): Press to access the DVD menu. The DVD power on when the DVD-A is inserted into the DVD slot. It must be manually turned on by the rear seat occupant through the remote control power button. Using - 2012 GMC Sierra | Owner's Manual - Page 241
DVD-V is inserted into the DVD slot, and does not automatically power on when the DVD-A is inserted into the DVD slot. It must be manually turned on by the rear seat occupant through the remote control power button. Stopping and Resuming Playback To stop playing a DVD without turning off the - 2012 GMC Sierra | Owner's Manual - Page 242
. Player Error: This message displays if there are disc load or disc eject problems. . It is very hot. When the temperature returns to normal, the disc , wet, or upside down. The air is very humid. If so, wait about an hour and try again. There was a problem while burning the disc. The label is - 2012 GMC Sierra | Owner's Manual - Page 243
information about how to connect and control a USB storage device or an iPod. USB Support The USB connector is located on the instrument panel or in the center console, and uses the USB 2.0 standard. USB‐Supported Devices ... Not all iPods and USB drives are compatible with the USB port. Make sure - 2012 GMC Sierra | Owner's Manual - Page 244
if the vehicle is in the ACC/ACCESSORY or ON/RUN position. When the battery. If you have an older iPod model that is not supported, it can still be used by console or on the instrument panel. If the vehicle is on and the USB connection works, song information on the radio's display. - 2012 GMC Sierra | Owner's Manual - Page 245
the softkey below h to view and select a file on an iPod, using the iPod's menu system. Files are sorted by: ... Playlists Artists Albums Genres Songs Composers j (Pause): Press the softkey below j to pause the track. The tab appears raised when pause is being used. Press the softkey below j again - 2012 GMC Sierra | Owner's Manual - Page 246
softkey below 2 to turn shuffle off. This is the default mode when a USB storage device or iPod is first connected. 2 (Shuffle All Songs/Shuffle Songs): Press the softkey below = or C to shuffle all songs on the USB storage device or iPod. C (Shuffle Album): Press the softkey below > to shuffle all - 2012 GMC Sierra | Owner's Manual - Page 247
Seat Entertainment (RSE) system. The RSE system works with the vehicle's audio system. The DVD player is part of the front radio. The RSE system the RSE system might not work until the temperature is within the operating range. The operating range for the RSE system is above −20°C (−4°F) or below 60 - 2012 GMC Sierra | Owner's Manual - Page 248
in use. Infrared transmitters are located at the rear of the overhead console. The headphones shut off automatically to save the battery power if the use the volume control located on the right side. For optimal audio performance, the headphones must be worn correctly. Headphones should be worn with - 2012 GMC Sierra | Owner's Manual - Page 249
system equipment. The A/V jacks, located on the rear of the floor console, allow audio or video signals to be connected from an auxiliary device such the auxiliary device to the A/V jacks. Refer to the manufacturer 's instructions for proper usage. Power for auxiliary devices is not supplied by the - 2012 GMC Sierra | Owner's Manual - Page 250
Audio (RSA) System on page 7‑46 for more information. Video Screen The video screen is located in the overhead console. To use the video screen: 1. Push the release button located on the overhead console. 2. Move the screen to the desired position. When the video screen is not in use, push it up - 2012 GMC Sierra | Owner's Manual - Page 251
aim it at the transmitter window at the rear of the RSE overhead console and press the desired button. Direct sunlight or very bright light could affect the remote control. If the remote control does not seem to be working, the batteries might need to be replaced. See "Battery Replacement" later - 2012 GMC Sierra | Owner's Manual - Page 252
again to go to the previous track or chapter. This button might not work when the DVD is playing the copyright information or the previews. u (Next go to the beginning of the next chapter or track. This button might not work while the DVD is playing the copyright information or the previews. s (Play - 2012 GMC Sierra | Owner's Manual - Page 253
DVD audio or CD, release the fast reverse button. This button might not work when the DVD is playing the copyright information or the previews. [ (Fast audio or CD, release the fast forward button. This button might not work while the DVD is playing the copyright information or the previews. { ( - 2012 GMC Sierra | Owner's Manual - Page 254
System Tips and Troubleshooting Chart Problem Recommended Action The ignition might not be turned to ON/RUN or ACC/ACCESSORY. Check the auxiliary mode, the picture moves or scrolls. The remote control does not work. After stopping the player, and pushing Play, sometimes the DVD starts where it - 2012 GMC Sierra | Owner's Manual - Page 255
Infotainment System Tips and Troubleshooting Chart (cont'd) Problem Sometimes the wireless headphone audio cuts out or buzzes. vehicle. *Excludes the OnStar® System. Cleaning the RSE Overhead Console When cleaning the RSE overhead console surface, use only a clean cloth dampened with clean water. - 2012 GMC Sierra | Owner's Manual - Page 256
7-46 Infotainment System The radio functionality is controlled by both the RSA and the front radio. Only one band can be tuned to at one time. Changing the band on the RSA or the front radio will change the band on the other system, if they are both sourced to the radio. The RSA functions can be - 2012 GMC Sierra | Owner's Manual - Page 257
seat passengers are listening to the disc. While a DVD video menu is being displayed, press either seek arrow to perform a cursor up or down on the menu. Hold either seek arrow to perform a cursor left or right on the menu. PROG (Program): Press this button to go to the next preset radio - 2012 GMC Sierra | Owner's Manual - Page 258
ACC/ACCESSORY position. The range of the Bluetooth system can be up to 9.1 m (30 ft). Not all phones support all functions, and not all phones work in a voice recognition menu. Noise: Keep interior noise levels to a minimum. The system Review the controls and operation of the infotainment system. . - 2012 GMC Sierra | Owner's Manual - Page 259
Use the buttons located on the steering wheel to operate the in‐vehicle Bluetooth system. See Steering Wheel Controls on page 5‑2 for more vehicle before it can be used. See the cell phone manufacturer's user guide for Bluetooth functions before pairing the cell phone. If a Bluetooth phone is - 2012 GMC Sierra | Owner's Manual - Page 260
phone that you want to pair. For help with this process, see the cell phone manufacturer's user guide. 5. Locate the device named "Your Vehicle" in the list on the cell phone. Follow the instructions on the cell phone to enter the PIN provided in Step 3. After the PIN is successfully entered, the - 2012 GMC Sierra | Owner's Manual - Page 261
Infotainment System Storing and Deleting Phone Numbers The system can store up to 30 phone numbers as name tags in the Hands‐Free Directory that is shared between the Bluetooth and OnStar systems, if equipped. The following commands are used to delete and store phone numbers. Store: This command - 2012 GMC Sierra | Owner's Manual - Page 262
7-52 Infotainment System Using the "Dial" or "Call" Command 1. Press and hold two seconds. To hear all of the numbers recognized by the system, say "Verify" at any time. 1. Press and hold two seconds. 2. Say "Digit Dial." 3. Say each digit, one at a time, that you want to dial. After each digit is - 2012 GMC Sierra | Owner's Manual - Page 263
, the audio system mutes and a ring tone is heard in the vehicle... 7-53 Three‐Way Calling Three‐way calling must be supported on the cell phone and enabled by the wireless service carrier. 1. While on a call, press 2. Say "Three‐way call." 3. Use the dial or call command to dial the number of - 2012 GMC Sierra | Owner's Manual - Page 264
phone's normal prompt messages will go through their cycle according to the phone's operating instructions. Clearing the System Unless information is deleted out of the in‐vehicle Bluetooth system phone. See your cell phone manufacturer's user guide to see if the cell phone supports this feature. - 2012 GMC Sierra | Owner's Manual - Page 265
is under license. Other trademarks and trade names are those of their respective owners. See Radio Frequency Statement on page 13‑20 for information regarding Part 15 of the Federal Communications Commission (FCC) rules and Industry Canada Standards RSS-GEN/210/220/310. 7-55 Trademarks and License - 2012 GMC Sierra | Owner's Manual - Page 266
7-56 Infotainment System 2 NOTES - 2012 GMC Sierra | Owner's Manual - Page 267
this system the heating, cooling, and ventilation can be controlled. Air Vents Air Vents ...8-10 A. Fan Control B. Temperature Control C. Air Delivery Mode Control D. Air Conditioning E. Outside Air F. Recirculation G. Rear Window Defogger Temperature Control: Turn clockwise or counterclockwise - 2012 GMC Sierra | Owner's Manual - Page 268
into the vehicle. The recirculation mode cannot be selected in the defog or defrost mode. When either mode is selected, the system runs the air conditioning compressor, unless the outside temperature is close to freezing. Do not drive the vehicle until all the windows are clear. ? (Recirculation - 2012 GMC Sierra | Owner's Manual - Page 269
the rear window defogger is on. The rear window defogger only works when the ignition is in ON/ RUN. The rear window defogger stays on for approximately 10 minutes after the button is pressed, unless the ignition is turned to ACC/ACCESSORY or LOCK/OFF. The defogger can also be turned off by - 2012 GMC Sierra | Owner's Manual - Page 270
or counterclockwise to increase or decrease the fan speed. Turn the knob all the way counterclockwise to turn the front system off. Air Delivery Mode Control: Turn clockwise or counterclockwise to increase or decrease the temperature inside the vehicle. - (Defog): This mode clears the windows - 2012 GMC Sierra | Owner's Manual - Page 271
0 (Defrost): This mode removes fog or frost from the windshield more quickly. Air is directed to the windshield and the side window vents, with some air directed to the floor vents. The system automatically forces outside air into the vehicle. Do not drive the vehicle until all the windows are clear - 2012 GMC Sierra | Owner's Manual - Page 272
changed. Press to turn the climate control system on or off. Outside air still enters the vehicle, and is directed to the floor. This direction temperature can also be adjusted using either temperature button. If the air delivery mode or temperature settings are adjusted with the system off, the - 2012 GMC Sierra | Owner's Manual - Page 273
display. Pressing either mode button while the system is off changes the air delivery mode without turning the system on. Pressing either mode button while in automatic control places the mode under manual control. The air delivery mode setting displays and the AUTO light turns off. The fan remains - 2012 GMC Sierra | Owner's Manual - Page 274
pressed, the button indicator flashes three times and will not work. If the passenger temperature buttons are adjusted, the driver It also helps the system to operate more efficiently. The air conditioning system removes moisture from the air, so a small amount of water might drip under the - 2012 GMC Sierra | Owner's Manual - Page 275
air inside the vehicle. It can be used to help prevent outside air and then turns off. The air conditioning compressor also comes on outside air button, or by turning used with the outside air mode. 8-9 Rear (Outside Air): Press to turn the outside air mode on. An selected, air from - 2012 GMC Sierra | Owner's Manual - Page 276
air outlets to open or close off the airflow. Operation Tips . The interior temperature sensor, located in the headliner, measures the temperature of the air circulate the air inside of the vehicle more effectively. Use of non‐GM approved hood deflectors can adversely affect the performance of the - 2012 GMC Sierra | Owner's Manual - Page 277
Vehicle Load Limits ...9-16 Truck-Camper Loading Information ...9-23 Starting the Engine ...Fast Idle System ...Retained Accessory Power (RAP) ...Engine Transmission Automatic Transmission ...9-35 Manual Mode ...9-38 Tow/Haul Mode ...9-39 Drive Systems Four-Wheel Drive ...9-40 Brakes Antilock - 2012 GMC Sierra | Owner's Manual - Page 278
distracted driving, always keep your eyes on the road, hands on the wheel, and mind on the drive. . . Designate a front seat passenger . Conversions and Add-Ons Add-On Electrical Equipment ...9-105 Adding a Snow Plow or Similar Equipment ...9-106 Pickup Conversion to Chassis Cab ...9-109 . . - 2012 GMC Sierra | Owner's Manual - Page 279
using a cell phone. If equipped, refer to the navigation manual for information on that system, including pairing and using a not drink and drive or ride with a driver who has been drinking. Ride home in a cab; or if you are with a group, designate a driver who will not drink. Assume that other - 2012 GMC Sierra | Owner's Manual - Page 280
a second. In that time, a vehicle moving at 100 km/h (60 mph) travels 20 m (66 ft), which could be a lot of distance in an emergency. Helpful braking tips situations when steering around a problem may be more effective than braking. Holding both sides of the steering wheel allows you to turn 180 - 2012 GMC Sierra | Owner's Manual - Page 281
the accelerator and then, if there is nothing in the way, steer the vehicle so that it straddles the edge of the pavement. Braking Skid - wheels are not rolling. Steering or Cornering Skid - too much speed or steering in a curve causes tires to slip and lose cornering force. Acceleration Skid - too - 2012 GMC Sierra | Owner's Manual - Page 282
the vehicle for extended periods without the front fascia lower air dam installed can cause improper air flow to the engine. Re‐attach the front fascia air dam after off-road driving. Remember: Antilock brakes help avoid only the braking skid. Off-Road Driving Four-wheel-drive vehicles can - 2012 GMC Sierra | Owner's Manual - Page 283
the steepness, traction, and obstructions. If the terrain ahead cannot be seen, get out of the an automatic transmission or any gear position for a manual transmission. This is because the N (Neutral) gear and keep a firm grip on the steering wheel. Maintain a slow speed. When possible, drive straight - 2012 GMC Sierra | Owner's Manual - Page 284
2. Shift into P (Park) for an automatic transmission or 1 (First) for a manual transmission and then restart the engine. . { WARNING Driving to the top of a vehicle headed straight down. Use a low gear because the engine will work with the brakes to slow the vehicle and help keep the vehicle under - 2012 GMC Sierra | Owner's Manual - Page 285
the parking brake, shift an automatic transmission into P (Park) or a manual transmission into 1 (First), and turn the vehicle off. 3.1. Leave the puts more weight on the downhill wheels which could cause a downhill slide or a rollover. Surface conditions can be a problem. Loose gravel, muddy spots, - 2012 GMC Sierra | Owner's Manual - Page 286
safe surfaces only. Notice: Do not drive through standing water if it is deep enough to cover the wheel hubs, axles or exhaust pipe. Deep water can damage the axle and other vehicle parts. If the standing water is not too deep, drive slowly through it. At faster speeds, water splashes on - 2012 GMC Sierra | Owner's Manual - Page 287
and uneven braking. Check the body structure, steering, suspension, wheels, tires, and exhaust system for damage and check the fuel lines through a large puddle of water or a car/vehicle wash, lightly apply the brake pedal until the brakes work normally. Flowing or rushing water creates strong - 2012 GMC Sierra | Owner's Manual - Page 288
than driving on flat or rolling terrain. Tips for driving in these conditions so hot that they would not work well. You would then have poor tips include: . . Keep the vehicle serviced and in good shape. Check all fluid levels vehicle well ventilated. Keep the interior temperature cool. Keep your eyes - 2012 GMC Sierra | Owner's Manual - Page 289
Be alert on top of hills; something could be in your lane (stalled car, accident). Pay attention to special road signs (falling rocks area, winding roads to break the fragile traction. If you accelerate too fast, the drive wheels will spin and polish the surface under the tires even more. The - 2012 GMC Sierra | Owner's Manual - Page 290
the side of the vehicle that is away from the wind to bring in fresh air. Fully open the air outlets on or under the instrument panel. Adjust the climate control system to a setting that circulates the air inside the vehicle and set the fan speed to the highest setting. See "Climate Control - 2012 GMC Sierra | Owner's Manual - Page 291
Rocking Your Vehicle to Get It Out Turn the steering wheel left and right to clear the area around the front wheels. For four-wheel-drive vehicles, shift into Four‐Wheel High. For vehicles with StabiliTrak®, turn the traction control part of the system off. Shift back and forth between R (Reverse - 2012 GMC Sierra | Owner's Manual - Page 292
9-16 Driving and Operating Recovery Hooks Vehicle Load Limits It is very important to know how much weight your vehicle can carry. This weight is called the vehicle capacity weight and includes the weight of all occupants, cargo, and all nonfactory-installed options. Two labels on your vehicle - 2012 GMC Sierra | Owner's Manual - Page 293
Driving and Operating WARNING (Continued) vehicle handles. This could cause loss of control and a crash. Overloading can also shorten the life of the vehicle. Tire and Loading Information Label 9-17 open, you will find the label attached below the door lock post (striker). The tire and loading - 2012 GMC Sierra | Owner's Manual - Page 294
(300 lbs) C. Available Occupant and Cargo Weight = 317 kg (700 lbs) a trailer, the load from your trailer will be transferred to your vehicle. Consult this manual to determine how this reduces the available cargo and luggage load capacity of - 2012 GMC Sierra | Owner's Manual - Page 295
Driving and Operating weight of the driver, passengers, and cargo should never exceed your vehicle's capacity weight. Certification/Tire Label 9-19 This is called Gross Vehicle Weight Rating (GVWR). The GVWR includes the weight of the vehicle, all occupants, fuel, and cargo. The Certification/Tire - 2012 GMC Sierra | Owner's Manual - Page 296
9-20 Driving and Operating The Certification/Tire label also contains important information help you load your vehicle the right way. If you put things inside your vehicle - like suitcases, tools, packages, or anything else - they go as fast as the vehicle goes. If you have to stop or turn quickly - 2012 GMC Sierra | Owner's Manual - Page 297
in this manual. See "Loading Your Vehicle for Off-Road Driving"under Off-Road Driving on page 9‑6. Two-Tiered Loading Depending on the model of wheel well and the rear of each wheel well. The center of gravity height must not extend above the top of the pickup box flareboard. Any load that extends - 2012 GMC Sierra | Owner's Manual - Page 298
and Operating Maximum Weight 340 kg (750 lbs) Loading Points Add-On Equipment When you carry removable items, you may need the pick-up box design. Additional accessories should use these load points. Depending on the accessory design, use a spacer under the accessory at the load points to remove gap - 2012 GMC Sierra | Owner's Manual - Page 299
23 When installing and loading a slide-in camper, check the manufacturer's instructions. When carrying a slide-in camper, the total cargo load of the vehicle is the weight of the camper, plus the following: . Refer to the Truck-Camper Loading Information label in the glove box for dimensions A and - 2012 GMC Sierra | Owner's Manual - Page 300
truck's cargo weight rating, and the camper's center of gravity (A) should fall within the truck's recommended center of gravity zone (B) when installed. Any accessories vehicle. When the truck‐camper is loaded, drive to a scale and weigh on the front and on the rear wheels separately to determine - 2012 GMC Sierra | Owner's Manual - Page 301
Driving and Operating 9-25 Starting and Operating New Vehicle Break-In Notice: The vehicle does not need an elaborate break-in. But it will perform better in the long run if you follow these guidelines: . . replacement. Follow this breaking-in guideline every time you get new brake linings. Do - 2012 GMC Sierra | Owner's Manual - Page 302
. The ignition switch has four different positions. To shift out of P (Park), the ignition must be in ON/RUN or ACC/ ACCESSORY and the regular brake pedal must be applied. A (STOPPING THE ENGINE/ LOCK/OFF): When the vehicle is stopped, turn the ignition switch to LOCK/OFF - 2012 GMC Sierra | Owner's Manual - Page 303
wheels turned off center. If this happens, move the steering wheel from right to left while turning the key to ACC/ACCESSORY. If this does not work, then the vehicle needs service allowed to drain for an extended period of time. D ( Notice: If you add electrical parts or accessories, you could change - 2012 GMC Sierra | Owner's Manual - Page 304
Engine cranking can be stopped by turning the ignition switch to the ACC/ACCESSORY or LOCK/OFF position. When the Low Fuel warning lamp is engine and transmission gently until the oil warms up and lubricates all moving parts. Starting Procedure 1. With your foot off the accelerator pedal, turn the - 2012 GMC Sierra | Owner's Manual - Page 305
control. The manual fast idle switch is operated using the cruise control buttons located on the left hand side of the steering wheel. This system . . . To control the fast idle: . . These features work when the key is in ON/RUN or ACC/ ACCESSORY. Once the key is turned from ON/RUN to LOCK/OFF, - 2012 GMC Sierra | Owner's Manual - Page 306
store the cord as it was before to keep it away from moving engine parts. If you do not, it could be damaged. Shifting Into Park { WARNING even when you are on fairly level ground, use the steps that follow. With four-wheel drive, if the transfer case is in N (Neutral), the vehicle will be free to - 2012 GMC Sierra | Owner's Manual - Page 307
running. The vehicle could move suddenly if the shift lever is not fully in P (Park) with the parking brake firmly set. If you have four-wheel drive and the transfer case is in N (Neutral), the vehicle will be free to roll, even if the shift lever is in P (Park). So be - 2012 GMC Sierra | Owner's Manual - Page 308
position. If you are still having a problem shifting, then have the vehicle serviced soon. When you are ready to drive, WARNING Things that can burn could touch hot exhaust parts under the vehicle and ignite. Do not park the ignition is in ON/RUN or ACC/ ACCESSORY and the regular brake pedal is - 2012 GMC Sierra | Owner's Manual - Page 309
enter the vehicle if: . There are holes or openings in the vehicle body from damage or aftermarket modifications that are not completely sealed. If unusual fumes are detected or if it is suspected that exhaust in an enclosed area such as a garage or a building that has no fresh air ventilation. . - 2012 GMC Sierra | Owner's Manual - Page 310
ground, always set the parking brake and move the shift lever to P (Park). { WARNING Four-wheel drive vehicles with the transfer case in N (Neutral) will allow the vehicle to roll, even if the enclosed area that has no fresh air ventilation. For more information, see Engine Exhaust on page 9‑33. - 2012 GMC Sierra | Owner's Manual - Page 311
the shift lever. Heavy Duty 6-Speed Automatic Transmission Shown (Light Duty 6‐Speed Similar) See "Range Selection Mode" under Manual Mode on page 9‑38. P (Park): This position locks the rear wheels. It is the best position to use when starting the engine because the vehicle cannot move easily. When - 2012 GMC Sierra | Owner's Manual - Page 312
sure the transfer case is in a drive gear, Two-Wheel Drive High or Four-Wheel Drive High or Four-Wheel Drive Low - not in Neutral. See Shifting Into Park N (Neutral): In this position, the engine does not connect with the wheels. To restart when you are already moving, use N (Neutral) only. Also - 2012 GMC Sierra | Owner's Manual - Page 313
to improve vehicle performance according to how the in shifting is normal. M (Manual Mode): This position is available on this feature, see "Range Selection Mode" under Manual Mode on page 9‑38. 9-37 3 ( use the brakes off and on. If you manually select 2 (Second) in an automatic transmission, - 2012 GMC Sierra | Owner's Manual - Page 314
hill or towing a trailer by letting you select a desired range of gears. To use this feature, do the following: 1. Move the shift lever to M (Manual Mode). 2. Press the plus/minus buttons, located on the steering column shift lever, to select the desired range of gears for current driving conditions - 2012 GMC Sierra | Owner's Manual - Page 315
after it detects wheel slip, preventing the tires from spinning. 6-Speed Automatic Transmission Vehicles with an automatic transmission have a Tow/Haul Mode. The Tow/Haul Mode adjusts the transmission shift pattern to reduce shift cycling, providing increased performance, vehicle control, and - 2012 GMC Sierra | Owner's Manual - Page 316
brake pedal usage. Using this information, it detects when the truck is on a downhill grade and the driver desires to slow on clean, dry pavement in Four-Wheel Drive High or Four-Wheel Drive Low for extended periods of time. Grade Braking (6-Speed Manual Mode on page 9‑38 for more information on - 2012 GMC Sierra | Owner's Manual - Page 317
vibration in the steering system. If the vehicle has StabiliTrak®, shifting into Four-Wheel Drive Low will turn Traction Control and StabiliTrak off. See StabiliTrak® System on page 9‑55. 9-41 Manual Transfer Case Front Axle The front axle engages and disengages automatically when you shift - 2012 GMC Sierra | Owner's Manual - Page 318
9‑55. *See Recreational Vehicle Towing on page 10‑93 or Towing the Vehicle on page 10‑93. Notice: Driving on clean, dry pavement in four-wheel drive for an extended period of time can cause premature wear on the vehicle's powertrain. Do not drive on clean, dry pavement in Four - 2012 GMC Sierra | Owner's Manual - Page 319
moving. In extremely cold weather, it may be necessary to stop or slow the vehicle to shift into Four-Wheel Drive High. When Using the Manual Transfer Case . . 9-43 Avoid driving in Four-Wheel Drive on clean, dry pavement. It may cause your tires to wear faster, make the transfer case harder to - 2012 GMC Sierra | Owner's Manual - Page 320
Low do not drive faster than 72 km/h (45 mph). This will reduce wear and extend the life of your transfer case. . Shifting In or Out of Four-Wheel Drive Low Notice: Shifting the transfer case into Four-Wheel-Drive Low while moving at speeds faster than 5 km/h (3 mph) may cause premature wear - 2012 GMC Sierra | Owner's Manual - Page 321
the steering column. Use the dial to shift into and out of four-wheel drive. Indicator lights in the dial show which setting you are in. do not come on, you should take the vehicle to your dealer for service. An indicator light flashes while shifting the transfer case and remains illuminated when - 2012 GMC Sierra | Owner's Manual - Page 322
Low is engaged, vehicle speed should be kept below 72 km/h (45 mph). Extended high-speed operation in Four-Wheel Drive Low may damage or shorten the life of the drivetrain. To shift to the Four-Wheel Drive Low position, the ignition must be in ON/RUN and the vehicle must be stopped - 2012 GMC Sierra | Owner's Manual - Page 323
flashing before shifting the transmission into gear. It is typical for the vehicle to exhibit significant engagement noise and bump when shifting between Four-Wheel Drive Low and Four-Wheel Drive High ranges or from transfer case N (Neutral) with the engine running. If the knob is turned to the Four - 2012 GMC Sierra | Owner's Manual - Page 324
to D (Drive) for one second. 8. Turn the ignition to ACC/ ACCESSORY, which will turn the engine off. 9. Place the transmission shift lever shift the transmission to N (Neutral). 3. Turn the transfer case dial to Two-Wheel Drive High. After the transfer case has shifted out of N (Neutral), the - 2012 GMC Sierra | Owner's Manual - Page 325
-road situations. This setting also engages the front axle to help drive the vehicle. This is the best setting to use when plowing snow. 4 n (Four-Wheel Drive Low): This setting also engages the front axle and delivers extra torque. You may never need this setting. It sends maximum power to all - 2012 GMC Sierra | Owner's Manual - Page 326
shifting. It will remain on when the shift is completed. Shifting Into Four-Wheel Drive Low When Four-Wheel Drive Low is engaged, vehicle speed should be kept below 72 km/h (45 mph). Extended high-speed operation in Four-Wheel Drive Low may damage or shorten the life of the drivetrain. To shift to - 2012 GMC Sierra | Owner's Manual - Page 327
not complete the shift. After 30 seconds the transfer case will shift to Four-Wheel Drive High mode. Shifting Out of Four-Wheel Drive Low To shift from Four-Wheel Drive Low to Four-Wheel Drive High, AUTO or Two-Wheel Drive High, the vehicle must be stopped or moving less than 5 km/h (3 mph) with - 2012 GMC Sierra | Owner's Manual - Page 328
to D (Drive) for one second. 8. Turn the ignition to ACC/ ACCESSORY, which will turn the engine off. 9. Place the transmission shift lever transmission to N (Neutral). 3. Turn the transfer case dial to Two-Wheel Drive High, Four-Wheel Drive High, or AUTO. After the transfer case has shifted out of - 2012 GMC Sierra | Owner's Manual - Page 329
wheels are slowing down. If one of the wheels is about to stop rolling, the computer will separately work the brakes at each wheel. ABS can change the brake pressure to each wheel very best braking. If there is a problem with ABS, this warning light stays on. See Antilock Brake System (ABS) Warning Light - 2012 GMC Sierra | Owner's Manual - Page 330
Light on page 5‑25. Notice: Driving with the parking brake on can overheat the brake system and cause premature wear or damage to brake system parts. Make sure that the parking If you are towing a trailer and are parking on a hill, see Driving Characteristics and Towing Tips on page 9‑74. Brake - 2012 GMC Sierra | Owner's Manual - Page 331
. When the vehicle is started and begins to move, the system performs several diagnostic checks to insure there are no problems. The system may be heard or felt while it is working. This is normal and does not mean there is a problem with the vehicle. The system should initialize before the vehicle - 2012 GMC Sierra | Owner's Manual - Page 332
on the DIC, the vehicle should be taken in for service. For more information on the DIC messages, see Ride on the instrument panel. The traction control part of StabiliTrak can be turned off by pressing may be heard or felt while it is working; this is normal. To disable both TCS and StabiliTrak - 2012 GMC Sierra | Owner's Manual - Page 333
automatically if it determines that a problem exists with the system. If the problem does not clear itself after restarting the vehicle, see your dealer for service. Traction Control Operation The TCS is part of the StabiliTrak system. Traction control limits wheel spin by reducing engine power to - 2012 GMC Sierra | Owner's Manual - Page 334
) on page 9‑54. Adding non‐dealer accessories can affect the vehicle's performance. See Accessories and Modifications on page 10‑3. Cruise Control , or gravel. It works like a standard axle most of the time, but when traction is low, this feature will allow the rear wheel with the most traction to - 2012 GMC Sierra | Owner's Manual - Page 335
erasing the set speed from memory. Once the vehicle speed reaches about 40 km/h (25 mph) or more, press the +RES button on the steering wheel. The vehicle returns to the previous set speed and stays there. Increasing Speed While Using Cruise Control If the cruise control system is already activated - 2012 GMC Sierra | Owner's Manual - Page 336
manually applied the cruise control is disengaged. Ending Cruise Control There are three ways to end cruise control: . Press and hold the SET- button on the steering wheel Using Cruise Control on Hills How well the cruise control works on hills depends on the vehicle speed, the load, and the steepness - 2012 GMC Sierra | Owner's Manual - Page 337
URPA comes on automatically when the shift lever is moved into R (Reverse). A single tone sounds to indicate the system is working. URPA operates only at speeds less than 8 km/h (5 mph). An obstacle is indicated by audible beeps. The interval between the beeps becomes shorter as the - 2012 GMC Sierra | Owner's Manual - Page 338
MANUAL air brakes on a very large truck, are affecting system performance. . The ultrasonic sensors are not clean. Keep the vehicle's rear bumper free of mud, dirt, snow, ice, and slush. For cleaning instructions Seem to Work Properly The following messages may be displayed on the DIC: SERVICE PARK - 2012 GMC Sierra | Owner's Manual - Page 339
Driving and Operating WARNING (Continued) using only the RVC screen, such as during longer, higher speed backing maneuvers, or where there could be cross-traffic. Perceived distances may be different from actual distances. Failure to use proper care before backing may result in injury, death, or - 2012 GMC Sierra | Owner's Manual - Page 340
R (Reverse) is approximately 10 seconds. The delay can be canceled by performing one of the following: . _ (Contrast): Touch the + (plus) align the vehicle when backing into a parking spot. If the vehicle has dual rear wheels, this feature will not be available. To turn the guidelines on or off: - 2012 GMC Sierra | Owner's Manual - Page 341
Driving and Operating 3. Press MENU to enter the configure menu options. Turn the Multifunction knob until the Display feature is highlighted and press the Multifunction knob. Or press the Display screen button 4. Select the Rear Camera Options screen button. The Rear Camera Options screen displays. - 2012 GMC Sierra | Owner's Manual - Page 342
the two exposed chassis harness connectors together to prevent contamination. A. Chassis harness connector B. Release tab 4. Feed the wiring harness through the pickup box, then plug the camera connectors together to prevent contamination. 5. Remove the tailgate. See Tailgate on page 2‑10 for more - 2012 GMC Sierra | Owner's Manual - Page 343
procedure to reinstall the RVC and make sure the grommet and connection are secure. . 9-67 When the System Does Not Seem To Work Properly The RVC system might not work properly or display a clear image if: . The back of the vehicle is in an accident, the position and mounting angle of the - 2012 GMC Sierra | Owner's Manual - Page 344
an important part of the proper maintenance of this vehicle. To help keep the engine clean and maintain optimum vehicle performance, we recommend when using gasoline rated at 87 octane or higher, the engine needs service. The eighth digit of the Vehicle Identification Number (VIN) shows the code - 2012 GMC Sierra | Owner's Manual - Page 345
when using gasoline rated at 87 octane or higher, the engine needs service. 9-69 Gasoline Specifications (U.S. and Canada Only) At a minimum, gasoline Additives on page 9‑70 for additional information. control system performance might be affected. The malfunction indicator lamp could turn on - 2012 GMC Sierra | Owner's Manual - Page 346
containing MMT can reduce spark plug life and affect emission control system performance. The malfunction indicator lamp might turn on. If this occurs, return to your dealer for service. Fuel Additives To provide cleaner air, all gasolines in the United States are now required to contain additives - 2012 GMC Sierra | Owner's Manual - Page 347
as corn and other crops. Many service stations will not have an 85% add less than 11 L (3 gal) when refueling. You should drive the vehicle immediately after refueling for at least 11 km (7 mi) to allow the vehicle to adapt to the change in ethanol concentration. E85 has less energy per liter - 2012 GMC Sierra | Owner's Manual - Page 348
cap, turn it slowly counterclockwise. If the vehicle is a dual fuel tank chassis cab model, and it runs out of fuel, refuel the front fuel tank first to To help avoid injuries to you and others, read and follow all the instructions on the fuel pump island. Turn off the engine when refueling. Do - 2012 GMC Sierra | Owner's Manual - Page 349
Driving and Operating The TIGHTEN GAS CAP message displays on the Driver Information Center (DIC) if the fuel cap is not fuel only into approved containers. Do not fill a container while it is inside a vehicle, in a vehicle's trunk, pickup bed, or on any surface other than the ground. (Continued) . - 2012 GMC Sierra | Owner's Manual - Page 350
and do not make starts at full throttle. This helps the engine and other parts of the vehicle wear in at the heavier loads. Vehicles can tow in (500 miles) the new vehicle is driven. The engine, axle, or other parts could be damaged. Important considerations that have to do with weight: ... Weight - 2012 GMC Sierra | Owner's Manual - Page 351
when towing a trailer: . Fully open the air outlets on or under the instrument panel. Adjust the to be sure the brakes work. During the trip, check occasionally to be sure that the road. Before starting, check all trailer hitch parts and attachments, safety chains, electrical connectors, Have - 2012 GMC Sierra | Owner's Manual - Page 352
to be sure the trailer bulbs are still working. immediately after towing at high altitude on steep . Backing Up Hold the bottom of the steering wheel with one hand. To move the trailer to the Always back up slowly and, if possible, have someone guide you. Driving on Grades Reduce speed and shift to a - 2012 GMC Sierra | Owner's Manual - Page 353
brakes until the chocks absorb the load. 4. Reapply the brake pedal. Then apply the parking brake and shift into P (Park). 5. If the vehicle is four-wheel-drive, be sure the transfer case is in a drive gear and not in N (Neutral). 6. Release the brake pedal. 9-77 { WARNING It can be dangerous to - 2012 GMC Sierra | Owner's Manual - Page 354
and Operating Maintenance when Trailer Towing The vehicle needs service more often when pulling a trailer. See Maintenance driven properly. For example, if the trailer is too heavy, the brakes may not work well or even at all. The driver and passengers could be seriously injured. The vehicle - 2012 GMC Sierra | Owner's Manual - Page 355
Driving and Operating Notice: Pulling a trailer improperly can damage the vehicle and result in costly repairs not covered by the vehicle warranty. To pull a trailer correctly, follow the advice in this section and see your dealer for important information about towing a trailer with the vehicle. To - 2012 GMC Sierra | Owner's Manual - Page 356
model and options. Weights listed apply for conventional trailers and fifth-wheel trailers unless otherwise noted. Vehicle 4.3L V6 (b) 4.3L V6 - With Automatic Transmission (b) 4.3L V6 - With Manual kg (12,000 lbs) 1500 Series 2WD Regular Cab Standard Box 1500 Series 2WD Extended Cab Standard Box - 2012 GMC Sierra | Owner's Manual - Page 357
5.3L V8 K5L HD Cooling Pkg - Fifth-Wheel Trailer 6.2L V8 K5L HD Cooling Pkg - Conventional Trailer 6.2L V8 K5L HD Cooling Pkg - Fifth-Wheel Trailer 6.2L V8 NHT Max Trailering Pkg - Conventional Trailer 6.2L V8 NHT Max Trailering Pkg - Fifth-Wheel Trailer 1500 Series 2WD Crew Cab Short Box (b) 4.8L - 2012 GMC Sierra | Owner's Manual - Page 358
kg (15,000 lbs) 6 804 kg (15,000 lbs) 5.3L V8 (LMG) K5L HD Cooling Pkg 5.3L V8 (LC9) XFE 5.3L V8 (LMG) K5L HD Cooling Pkg 6.2L V8 K5L HD Cooling Pkg 6.2L V8 NHT Max Trailering Pkg 1500 Series 2WD Regular Cab Long Box 4.3L V6 (b) 4.3L V6 (b) 4.8L V8 (b) 4.8L V8 (b) 5.3L V8 - 2012 GMC Sierra | Owner's Manual - Page 359
1500 Series 2WD Extended Cab Long Box 5.3L V8 (b) 5.3L V8 K5L HD Cooling Pkg (b) 5.3L V8 K5L HD Cooling Pkg - Conventional Trailer 5.3L V8 K5L HD Cooling Pkg - Fifth-Wheel Trailer 1500 Series 4WD Regular Cab Standard Box 4.3L V6 (b) 4.8L V8 (b) 5.3L V8 (b) 5.3L V8 K5L HD Cooling Pkg 5.3L V8 K5L HD - 2012 GMC Sierra | Owner's Manual - Page 360
257 kg (16,000 lbs) 7 257 kg (16,000 lbs) 1500 Series 4WD Extended Cab Standard Box 4.8L V8 (b) 5.3L V8 (b) 5.3L V8 K5L HD Cooling Pkg (b) 5.3L V8 K5L HD Cooling Pkg - Conventional Trailer 5.3L V8 K5L HD Cooling Pkg - Fifth-Wheel Trailer 6.2L V8 K5L HD Cooling Pkg - Conventional Trailer 6.2L V8 K5L - 2012 GMC Sierra | Owner's Manual - Page 361
Long Box 4.3L V6 (b) 4.8L V8 (b) 5.3L V8 (b) 5.3L V8 K5L HD Cooling Pkg 5.3L V8 K5L HD Cooling Pkg - Conventional Trailer 5.3L V8 K5L HD Cooling Pkg - Fifth-Wheel Trailer 1500 Series 4WD Extended Cab Long Box 5.3L V8 (b) 5.3L V8 K5L HD Cooling Pkg (b) 3.08 3.08 2 631 kg (5,800 lbs) 2 948 kg (6,500 - 2012 GMC Sierra | Owner's Manual - Page 362
Wheel Trailer 2500 Series 2WD Regular Cab Long Box HD 6.0L V8 6.0L V8 - Payload Performance Pkg (UB7) 6.0L V8 - Conventional Trailer 6.0L V8 - Fifth-Wheel Trailer 2500 Series 2WD Extended Cab Standard Box HD (20,500 lbs) 9 299 kg (20,500 lbs) 7 257 kg (16,000 lbs) 9 299 kg (20,500 lbs) 9 299 kg (20, - 2012 GMC Sierra | Owner's Manual - Page 363
lbs) 5 897 kg (13,000 lbs) 6 441 kg (14,200 lbs) GCWR (a) 9-87 2500 Series 2WD Extended Cab Long Box HD 7 257 kg (16,000 lbs) 9 299 kg (20,500 lbs) 9 299 kg (20,500 lbs) 7 257 kg (16,000 lbs) 9 299 kg (20,500 lbs) 9 299 kg (20,500 lbs) 7 257 kg (16,000 lbs) 9 299 kg - 2012 GMC Sierra | Owner's Manual - Page 364
Trailer 6.0L V8 - Fifth-Wheel Trailer 2500 Series 4WD Extended Cab Long Box HD 6.0L V8 6.0L V8 - Conventional Trailer 6.0L V8 - Fifth-Wheel Trailer 2500 Series 4WD Crew Cab Long Box HD 6.0L V8 6.0L V8 - Conventional Trailer 6.0L V8 - Fifth-Wheel Trailer 3500 Series 2WD Regular Cab Long Box 6.0L V8 - 2012 GMC Sierra | Owner's Manual - Page 365
) 6.0L V8 (Dual Rear Wheels) 3500 Series 2WD Extended Cab Long Box 6.0L V8 (Single Rear Wheels) 6.0L V8 (Single Rear Wheels) Conventional Trailer 6.0L V8 (Single Rear Wheels) Fifth-Wheel Trailer 6.0L V8 (Dual Rear Wheels) 6.0L V8 (Dual Rear Wheels) 3500 Series 2WD Crew Cab Standard Box 6.0L V8 6.0L - 2012 GMC Sierra | Owner's Manual - Page 366
6.0L V8 (Dual Rear Wheels) 3500 Series 4WD Regular Cab Long Box 6.0L V8 (Single Rear Wheels) 6.0L V8 (Single Rear Wheels) Conventional Trailer 6.0L V8 (Single Rear Wheels) Fifth-Wheel Trailer 6.0L V8 (Dual Rear Wheels) 6.0L V8 (Dual Rear Wheels) 3500 Series 4WD Extended Cab Long Box 6.0L V8 (Single - 2012 GMC Sierra | Owner's Manual - Page 367
6.0L V8 (Single Rear Wheels) Fifth-Wheel Trailer 6.0L V8 (Dual Rear Wheels) 6.0L V8 (Dual Rear Wheels) 3500 Series 4WD Crew Cab Standard Box 6.0L V8 6.0L V8 - Conventional Trailer 6.0L V8 - Fifth-Wheel Trailer 3500 Series 4WD Crew Cab Long Box 6.0L V8 (Single Rear Wheels) 6.0L V8 (Single Rear - 2012 GMC Sierra | Owner's Manual - Page 368
load (A) of any trailer is very important because it is also part of the vehicle weight. The Gross Vehicle Weight (GVW) includes the more information. Trailer tongue weight (A) should be 10 to 15 percent and fifth-wheel or gooseneck kingpin weight should be 15 to 25 percent of the loaded trailer - 2012 GMC Sierra | Owner's Manual - Page 369
(4,000 lbs) 2 495 kg (5,500 lbs) 9-93 Vehicle Series 1500 1500 1500 2500/3500 Standard Box 2500/ 3500 Long Box 2500 3500 Single Rear Wheels 3500 Dual Rear Wheels Hitch Type Weight Carrying Weight Distributing Fifth-Wheel Gooseneck Weight Carrying or Weight Distributing Weight Carrying or Weight - 2012 GMC Sierra | Owner's Manual - Page 370
the trailer tongue weight among the two vehicle and trailer axles. Fifth-wheel and gooseneck hitches may also be used. See "Weight of the Trailer or refer to the trailer manufacturer's recommendations and instructions. Weight-Distributing Hitch Adjustment Weight of the Trailering Combination - 2012 GMC Sierra | Owner's Manual - Page 371
-wheel hitch assemblies can help this condition. There should be at least six inches of clearance between the top of the pickup box and the bottom of the trailer shelf that extends over the box. Make sure the hitch is attached to the tow vehicle frame rails. Do not use the pickup box for support - 2012 GMC Sierra | Owner's Manual - Page 372
and Operating Basic Trailer Wiring All regular, extended cab and crew cab pickups have a seven-wire trailer towing harness. Package Be sure to follow the proper installation instructions included with any electrical equipment that is installed. Notice: Leaving electrical equipment on for extended - 2012 GMC Sierra | Owner's Manual - Page 373
on the headlamps as a second way to boost the vehicle system and charge the battery. Camper/Fifth-Wheel Trailer Wiring Package The seven-wire camper harness is located under the front edge of the pickup box on the driver side of the vehicle, attached to the frame bracket. A connector must be added - 2012 GMC Sierra | Owner's Manual - Page 374
aftermarket controllers to control the trailer brakes at the same time. Electric Brake Control Wiring Provisions These wiring provisions are included with the vehicle as part of the trailer wiring package installed by your dealer or a qualified service center. If the vehicle is equipped with terrain. - 2012 GMC Sierra | Owner's Manual - Page 375
the vehicle's antilock brake or StabiliTrak systems to activate, power sent to the trailer's brakes will be automatically adjusted to minimize trailer wheel lock-up. This does not imply that the trailer has StabiliTrak. Non-hybrid vehicles with StabiliTrak have a Trailer Sway Control (TSC) feature - 2012 GMC Sierra | Owner's Manual - Page 376
other property. An aftermarket controller may be available for use with trailers with surge, air, or electric‐over correctly. The trailer 's brakes are in proper working condition. The trailer and vehicle are properly loaded for performance of the system resulting from out-of-factory installation. - 2012 GMC Sierra | Owner's Manual - Page 377
Brake Display Page can be displayed by performing any of the following actions: ... 9- Manual Trailer Brake Apply lever. Connecting a trailer equipped with electric trailer brakes. . A. Manual button (if equipped). All DIC warning and service messages must first be acknowledged by the driver by - 2012 GMC Sierra | Owner's Manual - Page 378
the trailer brakes. The power output to the trailer is indicated in the Trailer Brake Display Page on the DIC. If the vehicle's service brakes are applied while using the Manual Trailer Brake Apply Lever, the trailer output power will be the greater of the two. The trailer's and the vehicle's brake - 2012 GMC Sierra | Owner's Manual - Page 379
trailer stopping performance. A proper working Manual Trailer Brake Apply Lever. Adjusting trailer gain at speeds lower than 32 to 40 km/h (20 to 25 mph) may result in an incorrect gain setting. 6. Adjust the Trailer Gain to just below the point of trailer wheel lock-up, indicated by trailer wheel - 2012 GMC Sierra | Owner's Manual - Page 380
message only re-appears when connecting the trailer wiring harness to the vehicle, the electrical fault is on the trailer side. SERVICE TRAILER BRAKE SYSTEM: This message will be displayed when there is a problem with the ITBC system. If this message persists over multiple ignition cycles, there is - 2012 GMC Sierra | Owner's Manual - Page 381
or trailer needs service. An authorized GM dealer may be able to diagnose and repair problems with the trailer. accessories can affect the vehicle performance. See Accessories and Modifications on page 10‑3 for more information. Conversions and Add-Ons Add-On Electrical Equipment Notice: Do not add - 2012 GMC Sierra | Owner's Manual - Page 382
package, called RPO VYU. If the vehicle has this option, you can add not have the snow plow prep package, adding a plow can damage the add one to the vehicle. If the vehicle has the snow plow prep package added to the vehicle, like a tool box or truck cap. The total weight of any additional cargo - 2012 GMC Sierra | Owner's Manual - Page 383
weight distribution ratio. The total vehicle must not exceed the GVW rating. United States In order to calculate the amount of weight any front accessory, such as a snow plow, is adding to the front axle, use the following formula: . Front axle reserve capacity is the difference between the Gross - 2012 GMC Sierra | Owner's Manual - Page 384
to have proper braking performance. If the brakes cannot work properly, you could have a crash. To help the brakes work properly when a mind that reserve capacity numbers are intended as a guide when selecting the amount of equipment or cargo the truck can carry. If unsure of the vehicle's front, - 2012 GMC Sierra | Owner's Manual - Page 385
9-109 Pickup Conversion to Chassis Cab We are aware that some vehicle owners might consider having the pickup box removed and a commercial or recreational package also have an emergency roof lamp provision package, RPO TRW. Wiring for the emergency roof lamp is provided above the overhead console - 2012 GMC Sierra | Owner's Manual - Page 386
9-110 Driving and Operating 2 NOTES - 2012 GMC Sierra | Owner's Manual - Page 387
Materials Requirements ...Accessories and Modifications ...10-2 10-3 10-3 10-3 Vehicle Checks Doing Your Own Service Work ...10-4 10-39 Pick-Up Box Identification and Fender Marker Lamps ...10-40 Taillamps (Chassis Cab Models) ...10-40 Taillamps, Turn Signal, Stoplamps, and Back-Up Lamps ...10-41 - 2012 GMC Sierra | Owner's Manual - Page 388
will receive genuine GM parts and GM-trained and supported service people. Genuine GM parts have one of these marks: Jump Starting Jump Starting ...10-88 Towing Towing the Vehicle ...10-93 Recreational Vehicle Towing ...10-93 Appearance Care Exterior Care ...10-98 Interior Care ...10-101 Floor - 2012 GMC Sierra | Owner's Manual - Page 389
and birth defects or other reproductive harm. Engine exhaust, many parts and systems, many fluids, and some component wear by-products contain / perchlorate. Accessories and Modifications Adding non‐dealer accessories or making modifications to the vehicle can affect vehicle performance and safety, - 2012 GMC Sierra | Owner's Manual - Page 390
the mileage and the date of any service work performed. See Maintenance Records on page 11‑16. { WARNING It can be dangerous to work on your vehicle if you do not have the proper knowledge, service manual, tools, or parts. Always follow owner manual procedures and consult the service manual for - 2012 GMC Sierra | Owner's Manual - Page 391
center of the grille. 1. Pull the handle with this symbol on it. It is located inside the vehicle to the lower left of the steering wheel. - 2012 GMC Sierra | Owner's Manual - Page 392
10-6 Vehicle Care Engine Compartment Overview 5.3 L V8 Engine Shown (4.3 L V6 Engine, 4.8 L V8 Engine, 6.0 L V8 Engine, and 6.2 L V8 Engine Similar) - 2012 GMC Sierra | Owner's Manual - Page 393
A. Engine Air Cleaner/Filter Engine Oil" in the Duramax Diesel Supplement. To ensure proper engine performance and long life, careful attention must be paid to engine oil the proper oil level. See "Checking Engine Oil" and "When to Add Engine Oil" in this section. Change the engine oil at the - 2012 GMC Sierra | Owner's Manual - Page 394
drain out the excess oil or limit driving of the vehicle and seek a service professional to remove the excess amount of oil. See Engine Compartment Overview on page 10‑6 for the location of the engine oil fill cap. Add enough oil to put the level somewhere in the proper operating range. Push - 2012 GMC Sierra | Owner's Manual - Page 395
−20°F service provider on whether the oil is approved to the dexos1 specification. Engine Oil Additives/Engine Oil Flushes Do not add anything to the oil. The recommended oils with the dexos specification and displaying the dexos certification mark are all that is needed for good performance - 2012 GMC Sierra | Owner's Manual - Page 396
LIFE REMAINING percentage is near 0%. Your dealer has trained service people who will perform this work and reset the system. It is also important to check driving conditions, the mileage at which an oil change is indicated can vary considerably. For the oil life system to work properly, the system - 2012 GMC Sierra | Owner's Manual - Page 397
of the fluid could come out and fall on hot engine parts or exhaust system parts, starting a fire. Too little fluid could cause the best to have this done at the dealer service department. If not taken to the dealer, be sure to follow all the instructions here or a false reading on the dipstick - 2012 GMC Sierra | Owner's Manual - Page 398
10-12 Vehicle Care Checking the Fluid Level Prepare the vehicle as follows: 1. Park the vehicle on a level place. Keep the engine running. 2. With the parking brake applied, place the shift lever in P (Park). 3. With your foot on the brake pedal, move the shift lever through each gear range, - 2012 GMC Sierra | Owner's Manual - Page 399
check is used only as a reference. If the fluid level is low, add only enough of the proper fluid to bring the level up to the HOT area for a hot check. It does not take much fluid, generally less than 0.5 Liter (1 Pint). Do not overfill. After adding fluid, recheck the fluid level as described - 2012 GMC Sierra | Owner's Manual - Page 400
then it may be necessary to have the vehicle towed to a dealer service department and have it repaired before driving the vehicle further. Notice: Use of the fluid could come out and fall on hot engine parts or exhaust system parts, starting a fire. Too little fluid could cause the transmission - 2012 GMC Sierra | Owner's Manual - Page 401
If the fluid level is below the COLD check band, add only enough fluid as necessary to bring the level into the COLD band. It does not take much fluid, generally less than 0.5 Liter (1 Pint). Do not overfill. 6. Perform a hot check at the first opportunity after the transmission reaches - 2012 GMC Sierra | Owner's Manual - Page 402
is between 71°C and 93°C (160°F and 200°F), add or drain fluid as necessary to bring the level into the HOT band. If the is the most accurate method to check the fluid level. The hot check should be performed at the first opportunity in order to verify the cold check. The fluid level rises - 2012 GMC Sierra | Owner's Manual - Page 403
the vehicle has a diesel engine, see "Pickup Models" under "Engine Air Cleaner/Filter" in the Duramax® Diesel Supplement for the correct inspection and replacement procedures. See Engine Compartment Overview on page 10‑6 for the location of the engine air cleaner/filter. How to Inspect the Engine - 2012 GMC Sierra | Owner's Manual - Page 404
can cause you or others to be burned. The air cleaner not only cleans the air; it helps to stop flames if the engine backfires. Use caution when working on the engine and do not drive with the air cleaner/filter off. 3. Remove the engine air cleaner/ filter from the housing. Take care to dislodge - 2012 GMC Sierra | Owner's Manual - Page 405
-19 { WARNING Heater and radiator hoses, and other engine parts, can be very hot. Do not touch them. If first. The following explains the cooling system and how to check and add coolant when it is low. If there is a problem with engine overheating, see Engine Overheating on page 10‑22. WARNING ( - 2012 GMC Sierra | Owner's Manual - Page 406
service center, familiar with legal requirements regarding used coolant disposal. This will help protect the environment and your health. it cools down. If coolant is visible but the coolant level is not at or above the FULL COLD mark, add core, and other parts. Notice: If extra in this manual for the - 2012 GMC Sierra | Owner's Manual - Page 407
underhood electric fan. If no coolant is visible in the surge tank, add coolant as follows: { WARNING You can be burned if you spill coolant on hot engine parts. Coolant contains ethylene glycol and it will burn if the engine parts are hot enough. Do not spill coolant on a hot engine. Notice: This - 2012 GMC Sierra | Owner's Manual - Page 408
the decision is made not to lift the hood when this warning appears, get service help right away. See Roadside Assistance Program (U.S. and Canada) on page 13 the coolant surge tank may be lower. If the level is lower, add more of the proper Notice: If the pressure cap is not tightly installed - 2012 GMC Sierra | Owner's Manual - Page 409
not, do not continue to run the engine and have the vehicle serviced. Notice: Engine damage from running your engine without coolant is not condition, can indicate a serious problem. If there is an engine overheat warning, but no steam is seen or heard, the problem may not be too serious. Sometimes - 2012 GMC Sierra | Owner's Manual - Page 410
vehicle to be driven to a safe place in an emergency. Driving extended km (mi) and/or towing a trailer in the overheat protection mode performance will be noticed. Engine Fan If the vehicle has a clutched engine cooling fan, when the clutch is engaged, the fan spins faster to provide more air to - 2012 GMC Sierra | Owner's Manual - Page 411
high outside temperatures, or operation of the air conditioning system, the fans may change to system damage and cause it to not work properly. Do not allow contaminants to the FULL COLD mark. If necessary, add only enough fluid to bring the level up problem. Have the system inspected and repaired. - 2012 GMC Sierra | Owner's Manual - Page 412
of each ignition cycle. When the WASHER FLUID LOW ADD FLUID message displays, washer fluid will need to and damage the washer fluid tank and other parts of the washer system. Fill the washer fluid be added, be sure to read the manufacturer's instructions before use. Use a fluid that has sufficient - 2012 GMC Sierra | Owner's Manual - Page 413
warning sound is heard, have the vehicle serviced. Notice: Continuing to drive with worn-out brake pads could result in costly brake repair. Replacing Brake System Parts The braking system on a vehicle is complex. Its many parts have to be of top quality and work well together if the vehicle is to - 2012 GMC Sierra | Owner's Manual - Page 414
if the wrong replacement brake parts are installed. { WARNING If too much brake fluid is added, it can spill on the engine and burn, if the engine is hot enough. You or others could be burned, and the vehicle could be damaged. Add brake fluid only when work is done on the brake - 2012 GMC Sierra | Owner's Manual - Page 415
10‑6. After work is done on the brake hydraulic system, make sure the level is above the MIN but not over the MAX mark. What to Add Use only new Notice . 10-29 Using the wrong fluid can badly damage brake hydraulic system parts. For example, just a few drops of mineral-based oil, such as engine - 2012 GMC Sierra | Owner's Manual - Page 416
and gas that can explode. You can be badly hurt if you are not careful. See Jump Starting on page 10‑88 for tips on working around Extended Storage: Remove the black, negative (−) cable from the battery or use a battery trickle charger. { WARNING Battery posts, terminals, and related accessories - 2012 GMC Sierra | Owner's Manual - Page 417
on page 11‑12 to determine what kind of lubricant to use. Manual Shift Transfer Case A. Fill Plug B. Drain Plug Active Transfer Case A. on the transfer case, some lubricant will need to be added. Add enough lubricant to raise the level to the bottom of the problem. Have it inspected and repaired. - 2012 GMC Sierra | Owner's Manual - Page 418
or an unusual noise is heard. A fluid loss could indicate a problem. Have it inspected and repaired. All axle assemblies are filled by volume volume. All Except 1500 Series A. Fill Plug B. Drain Plug 1500 Series A. Fill Plug B. Drain Plug . . When the differential is cold, add enough lubricant to - 2012 GMC Sierra | Owner's Manual - Page 419
that the rear axle assembly must be supported to get a true reading. 10-33 How 1500 Series applications, the proper level is from 15 mm to 40 mm (0.6 in to 1.6 in) below the bottom of the fill plug hole, located on the rear axle. Add only enough fluid to reach the proper level. For all 6.0 L 2500HD - 2012 GMC Sierra | Owner's Manual - Page 420
control, prior to its sale or delivery to the L Duramax Diesel 2500HD Series applications and all 3500 Series applications, the proper level is from 17 mm to 21 mm (0.6 in to 0.8 in) below the bottom of the fill plug hole, located on the rear axle. Add . . Air Intake: . - 2012 GMC Sierra | Owner's Manual - Page 421
, try to move the shift lever out of P (Park) with normal effort. If the shift lever moves out of P (Park), contact your dealer for service. { WARNING When you are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured. 1. Before starting this - 2012 GMC Sierra | Owner's Manual - Page 422
) mechanism's holding ability: With the engine running, shift to P (Park). Then release the parking brake followed by the regular brake. . Contact your dealer if service is required. 2. Squeeze the grooved areas on each side of the blade, and turn the blade assembly away from the arm connector. - 2012 GMC Sierra | Owner's Manual - Page 423
that the vehicle be taken to the dealer for service if the headlamps need to be adjusted. It is Be fully assembled and all other work stopped while headlamp aiming is being performed. Be loaded with a full tank the proper type and size, see Maintenance Replacement Parts on page 11‑15. . . . Glass - 2012 GMC Sierra | Owner's Manual - Page 424
10-38 Vehicle Care 6. Turn on the low-beam headlamps and place a piece of cardboard or equivalent in front of the headlamp not being adjusted. This allows only the beam of light from the headlamp being adjusted to be seen on the flat surface. 4. At a wall, measure from the ground upward (A) to the - 2012 GMC Sierra | Owner's Manual - Page 425
Steps 7 through 9 for the opposite headlamp. Halogen bulbs have pressurized gas inside and can burst if you drop or scratch the bulb. You or others could be injured. Be sure to read and follow the instructions on the bulb package. A. Side Marker Lamp B. Low-Beam Headlamp C. High-Beam Headlamp - 2012 GMC Sierra | Owner's Manual - Page 426
side, remove the Engine Air Cleaner cover. See Engine Air Cleaner/Filter on page lighting assembly contact your dealer. To replace a pickup box fender marker lamp bulb: 1. Press the . 6. Reinstall the lamp assembly. Taillamps (Chassis Cab Models) A. Backup Lamp B. Stoplamp/Taillamp/Turn Signal - 2012 GMC Sierra | Owner's Manual - Page 427
Vehicle Care 4. Install a new bulb into the socket, turn it clockwise, and press it in until it is tight. 5. Reinstall the lens and the four screws. To replace one of these bulbs: 1. Open the tailgate. See Tailgate on page 2‑10 for more information. 10-41 3. Turn the bulb socket counterclockwise - 2012 GMC Sierra | Owner's Manual - Page 428
10-42 Vehicle Care 2. On the reverse side of the lamp assembly, remove the bulb socket by turning it one quarter turn counterclockwise and pull it straight out. 3. Remove the bulb by pulling it straight out of the socket. 4. Install the bulb by pushing the bulb straight into the socket. Center - 2012 GMC Sierra | Owner's Manual - Page 429
Lamp Sidemarker Lamp Stoplamp/Turn Signal Lamp/ Taillamp* * Chassis Cab Models For replacement bulbs not listed here, contact your dealer. Bulb Number fuse with a new one of the identical size and rating. If there is a problem on the road and a fuse needs to be replaced, the same amperage fuse can - 2012 GMC Sierra | Owner's Manual - Page 430
reduces the chance of fires caused by electrical problems. Look at the silver-colored band inside the problem on the road and don't have a spare fuse, you can borrow one that has the same amperage. Just pick some feature of your vehicle that you can get along without- like the radio or accessory - 2012 GMC Sierra | Owner's Manual - Page 431
Vehicle Care The Engine Compartment Fuse Block is located in the engine compartment, on the driver side of the vehicle. 10-45 Lift the cover to access the fuse block. Notice: Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical - 2012 GMC Sierra | Owner's Manual - Page 432
10 11 12 13 14 15 16 17 18 19 20 21 Vehicle Care Usage Antilock Brakes System 2 Trailer Back- Transmission Control Module (Battery) Vehicle Back-up Lamps Passenger Side Low-Beam Headlamp Air Conditioning Compressor Oxygen Sensors Transmission Controls (Ignition) Fuel Pump Fuel System Control Module - 2012 GMC Sierra | Owner's Manual - Page 433
54 55 56 Usage Heated Mirrors SEO B1 Upfitter Usage (Battery) Accessory Power Outlet SEO Upfitter Usage Climate Controls (Ignition) Engine Control Module, Cooling Fan Control Low-Beam Headlamp Front Fog Lamps Air Conditioning Compressor Starter Powertrain Fuel Pump Parking Lamps Rear Defogger Switched Power J-Case Fuses - 2012 GMC Sierra | Owner's Manual - Page 434
to access the fuse block. The vehicle may not be equipped with all of the fuses, relays, and features shown. Fuses Usage 1 2 Rear Seats Rear Accessory Power Outlet Fuses 3 4 5 Usage Steering Wheel Controls Backlight Driver Door Module Dome Lamps, Driver Side Turn Signal - 2012 GMC Sierra | Owner's Manual - Page 435
Feature) Stoplamps, Center High‐Mounted Stoplamp Rear Climate Controls Power Mirror Body Control Module (BCM) Accessory Power Outlets 26 Fuses 17 18 19 20 21 22 23 24 25 Usage Interior Lamps Power Door Lock 1 (Unlock Feature) Rear Seat Entertainment Ultrasonic Rear Parking Assist, Power Liftgate - 2012 GMC Sierra | Owner's Manual - Page 436
Tires Every new GM vehicle has high-quality tires made by a leading tire manufacturer. See the warranty manual for information regarding the tire warranty and where to get service. For additional information refer to the tire manufacturer. Harness Connector BODY 2 BODY 1 BODY 3 Usage Body Harness - 2012 GMC Sierra | Owner's Manual - Page 437
crash. Only the dealer or an authorized tire service center should repair, replace, dismount, and mount the is not recommended for "off‐road" driving or commercial uses such as snow plowing. See Off-Road for high speed driving. 20‐Inch Tires If the vehicle has 20‐inch P275/55R20 size tires, they - 2012 GMC Sierra | Owner's Manual - Page 438
service description. See the "Tire Size" illustration later in this section for more detail. (B) TPC Spec (Tire Performance Criteria Specification): Original equipment tires designed to GM's specific tire performance show a typical passenger and light truck tire sidewall. Passenger (P‐Metric) Tire - 2012 GMC Sierra | Owner's Manual - Page 439
support that load. For information on recommended tire pressure see Tire Pressure on page 10‑58 and Vehicle Load Limits on page 9‑16. aspect ratio, construction type, and service one side may have the date of manufacture. Light Truck (LT-Metric) Tire (A) Tire Size: The tire size code is a - 2012 GMC Sierra | Owner's Manual - Page 440
Rim Diameter : Diameter of the wheel in inches. (F) Service Description: These characters represent the can be carried and the maximum pressure needed to support that load when used as a single. For examples show a typical passenger vehicle and light truck tire size. (A) Passenger (P‐Metric) Tire: - 2012 GMC Sierra | Owner's Manual - Page 441
the tire size mean a light truck tire engineered to standards set by wheel usage Tire Terminology and Definitions Air Pressure: The amount of air inside the tire pressing outward on each square inch of the tire. Air pressure is expressed in kPa (kilopascal) or psi (pounds per square inch). Accessory - 2012 GMC Sierra | Owner's Manual - Page 442
(kPa): The metric unit for air pressure. Light Truck (LT‐Metric) Tire: A tire used on light duty trucks and some multipurpose passenger vehicles. . Cold Tire Pressure: The amount of air pressure in a tire, measured in kPa (kilopascal) or psi (pounds per square inch) before a tire has built up heat - 2012 GMC Sierra | Owner's Manual - Page 443
(P-Metric) Tire: A tire used on passenger cars and some light duty trucks and multipurpose vehicles. Recommended Inflation Pressure: Vehicle tire in which the ply cords that extend to the beads are laid at 90 degrees to the centerline of the tread. Rim: A metal support for a tire and upon which the - 2012 GMC Sierra | Owner's Manual - Page 444
the Tire: Load on an individual tire due to curb weight, accessory weight, occupant weight, and cargo weight. Vehicle Placard: A label permanently 10‑70. Tire Pressure Tires need the correct amount of air pressure to operate effectively. Notice: Neither tire underinflation nor overinflation is - 2012 GMC Sierra | Owner's Manual - Page 445
inflation pressures. The recommended pressure is the minimum air pressure needed to support the vehicle's maximum load carrying capacity. For no further adjustment is necessary. If the inflation pressure is low, add air until the recommended pressure is reached. If the inflation pressure is high, - 2012 GMC Sierra | Owner's Manual - Page 446
160 km/h (100 mph) or higher. Set the cold tire inflation pressure to 20 kPa (3 psi) above the recommended cold tire pressure shown on the Tire and Loading tire pressure levels. The TPMS sensors monitor the air pressure in your tires and transmit tire pressure readings to a receiver located - 2012 GMC Sierra | Owner's Manual - Page 447
and wheels allow the TPMS to continue to function properly. See Tire Pressure Monitor Operation on page 10‑62 for additional information. Federal Communications Commission (FCC) Rules and with Industry Canada Standards See Radio Frequency Statement on page 13‑20 for information regarding Part 15 - 2012 GMC Sierra | Owner's Manual - Page 448
the driver when a low tire pressure condition exists. TPMS sensors are mounted onto each tire and wheel assembly, excluding the spare tire and wheel assembly. The TPMS sensors monitor the air pressure in the tires and transmit the tire pressure readings to a receiver located in the vehicle. When - 2012 GMC Sierra | Owner's Manual - Page 449
light and DIC warning message come on at each ignition cycle until the problem is corrected. Some of the conditions that can cause these to come on performed successfully. See your dealer for service. Replacement tires or wheels do not match the original equipment tires or wheels. Tires and wheels - 2012 GMC Sierra | Owner's Manual - Page 450
. Then press the button to activate the TPMS sensor. A horn chirp confirms that the sensor identification code has been matched to this tire and wheel position. 6. Proceed to the passenger side front tire, and repeat the procedure in Step 5. 7. Proceed to the passenger side rear tire, and repeat the - 2012 GMC Sierra | Owner's Manual - Page 451
switch to LOCK/OFF. 10. Set all four tires to the recommended air pressure level as indicated on the Tire and Loading Information label. . of the size or location of the damage. . If your vehicle has dual rear wheels, also see Dual Tire Rotation on page 10‑67. Tire Inspection We recommend that the - 2012 GMC Sierra | Owner's Manual - Page 452
the Tire and { WARNING Rust or dirt on a wheel, or on the parts to which it is fastened, can make wheel nuts become loose after time. The wheel could come off and cause an accident. When changing a wheel, remove any rust or dirt from places where the wheel attaches to the vehicle. In an emergency - 2012 GMC Sierra | Owner's Manual - Page 453
Tire Rotation When the vehicle is new, or whenever a wheel, wheel bolt, or wheel nut is replaced, check the wheel nut torque after 160, 1 600, and 10 000 km that is underinflated, the tire can overheat. An overheated tire can lose air suddenly or catch fire. You or others could be injured. Properly - 2012 GMC Sierra | Owner's Manual - Page 454
more information on when tires should be replaced. Parking for an extended period can cause flat spots on the tires that may result were designed to meet General Motors Tire Performance Criteria Specification (TPC Spec) system rating. commercial truck tires may not have treadwear indicators. See Tire - 2012 GMC Sierra | Owner's Manual - Page 455
and handling performance may be adversely affected if all the tires are not replaced at the same time. See Tire Inspection on page 10‑65 and Tire Rotation on page 10‑65 for information on proper tire rotation. 10-69 WARNING (Continued) Only your dealer or authorized tire service center should - 2012 GMC Sierra | Owner's Manual - Page 456
. See Buying New Tires on page 10‑68 and Accessories and Modifications on page 10‑3. Different Size Tires and Wheels If wheels or tires are installed that are a different size than the original equipment wheels and tires, vehicle performance, including its braking, ride and handling characteristics - 2012 GMC Sierra | Owner's Manual - Page 457
to 12 inches (25 to 30 cm), or to some limited-production tires. While the tires available on General Motors passenger cars and light trucks may vary when tested under controlled conditions on a specified indoor laboratory test wheel. Sustained high temperature can cause the material of the tire to - 2012 GMC Sierra | Owner's Manual - Page 458
109. Grades B and A represent higher levels of performance on the laboratory test wheel than the minimum required by law. Warning: The . If wheel nuts keep coming loose, the wheel, wheel bolts and wheel nuts should be replaced. If the wheel leaks air, replace it. Some aluminum wheels can be - 2012 GMC Sierra | Owner's Manual - Page 459
the braking and handling of the vehicle. Tires can lose air, and cause loss of control, causing a crash. Always use the correct wheel, wheel bolts, and wheel nuts for replacement. Notice: The wrong wheel can also cause problems with bearing life, brake cooling, speedometer or odometer calibration - 2012 GMC Sierra | Owner's Manual - Page 460
combination and road conditions. Follow that manufacturer's instructions. To help avoid damage to the vehicle Notice: If the vehicle does not have dual wheels and has a tire size other than P265/65R18 damage to the brakes, suspension, or other vehicle parts. The area damaged by the tire chains could - 2012 GMC Sierra | Owner's Manual - Page 461
a tire to blowout while driving, especially if the tires are maintained properly. If air goes out of a tire, it is much more likely to leak out slowly. while severely underinflated or flat. Have your dealer or an authorized tire service center repair or replace the flat tire as soon as possible. { - 2012 GMC Sierra | Owner's Manual - Page 462
tire (B), use the following example as a guide to assist in the placement of the wheel blocks (A). The following information explains how to an automatic transmission in P (Park) or a manual transmission in 1 (First) or R (Reverse). 3. For four-wheel-drive vehicles, be sure the transfer case is in - 2012 GMC Sierra | Owner's Manual - Page 463
underbody-mounted spare tire. Extended Cab A. Wing Nut Retaining Tool Kit B. Tool Kit Regular Cab A. Wing Nut Retaining Tool Kit B. Tool Kit C. Wheel Blocks D. Jack E. Jack Knob F. Wing Nut Retaining Wheel Blocks C. Wheel Blocks D. Jack E. Jack Knob For regular cab models, the equipment you will - 2012 GMC Sierra | Owner's Manual - Page 464
the rear bumper. A. Spare Tire (Valve Stem Pointed Down) B. Hoist Assembly C. Hoist Cable D. Tire/Wheel Retainer E. Hoist Shaft F. Hoist End of Extension Tool G. Hoist Shaft Access Hole H. Wheel Wrench 2. Assemble the wheel wrench (H) and the two jack handle extensions (I), as shown. Do not use the - 2012 GMC Sierra | Owner's Manual - Page 465
If the vehicle has a center cap with wheel nut caps, the wheel nut caps are designed to stay with the center cap after they are loosened. Remove the entire center cap. Removing the Flat Tire and Installing the Spare Tire Use the following pictures and instructions to remove the flat tire and raise - 2012 GMC Sierra | Owner's Manual - Page 466
center cap, place the chisel end of the wheel wrench in the slot on the wheel, and gently pry it out. 3. Use the wheel wrench and turn it counterclockwise to loosen the wheel nuts. Do not remove the wheel nuts yet. Front Position - 1500 Models 4. Position the jack under the vehicle, as shown - 2012 GMC Sierra | Owner's Manual - Page 467
, as shown. If the flat tire is on the front of the vehicle (all other models), position the jack on the frame behind the flat tire. Rear Position - 1500 Models 5. If the flat tire is on the rear, for 1500 models position the jack under the rear axle about 5 cm (2 in) inboard of the shock - 2012 GMC Sierra | Owner's Manual - Page 468
wheel, or on the parts to which it is fastened, can make wheel nuts become loose after time. The wheel could come off and cause an accident. When changing a wheel, remove any rust or dirt from places where the wheel Never get under a vehicle when it is supported only by a jack. { WARNING Raising the - 2012 GMC Sierra | Owner's Manual - Page 469
with the rounded end of the nuts toward the wheel. 8. Remove any rust or dirt from the wheel bolts, mounting surfaces, and spare wheel. 9. Install the spare tire. 11. Tighten each wheel nut by hand. Then use the wheel wrench to tighten the nuts until the wheel is held against the hub. 12. Turn the - 2012 GMC Sierra | Owner's Manual - Page 470
aftermarket manufacturer when using accessory locking wheel nuts. See Capacities and Specifications on page 12‑2 for original equipment wheel nut torque specifications. Notice: Improperly tightened wheel wheel with a flat tire under your vehicle for an extended period of time or with the valve - 2012 GMC Sierra | Owner's Manual - Page 471
with the valve stem pointed down, and to the rear. 2. Pull the cable and spring through the center of the wheel. Tilt the wheel retainer plate down and through the center wheel. A. Flat or Spare Tire (Valve Stem Pointed Down) B. Hoist Assembly C. Hoist Cable Make sure the retainer is fully seated - 2012 GMC Sierra | Owner's Manual - Page 472
has one. To store the jack and jack tools: G. Jack H. Bolt Retaining Wheel Blocks 1. Put the tools (D) in the tool bag (E) and place them in the retaining bracket (C). 2. Tighten down the wing nut (C). 3. Assemble the wheel blocks (B) and jack (G) together with the wing nut (A) and retaining bolt - 2012 GMC Sierra | Owner's Manual - Page 473
spare tire. A spare tire may lose air over time, so check its inflation pressure regarding proper tire inflation and loading your vehicle. For instruction on how to remove, install or store a spare covered by the warranty. Never use four-wheel drive when a different size spare tire is installed - 2012 GMC Sierra | Owner's Manual - Page 474
the warranty. Trying to start the vehicle by pushing or pulling it will not work, and it could damage the vehicle. 1. Check the other vehicle. It must not be able to They contain acid that can burn you. They contain gas that can explode or ignite. They contain enough electricity to burn you. . - 2012 GMC Sierra | Owner's Manual - Page 475
transmission in P (Park) or a manual transmission in Neutral before setting the parking brake. If you have a four-wheel-drive vehicle, be sure the transfer Turn off the ignition on both vehicles. Unplug unnecessary accessories plugged into the accessory power outlets. Turn off the radio and all the - 2012 GMC Sierra | Owner's Manual - Page 476
of fluid is there. If it is low, add water to take care of that first. If you do not, explosive gas could be present. Battery fluid contains acid that . { WARNING Using an open flame near a battery can cause battery gas to explode. People have been hurt doing this, and some have been blinded. - 2012 GMC Sierra | Owner's Manual - Page 477
terminal if the vehicle has one. Do not connect positive (+) to negative (−) or you will get a short that would damage the battery and maybe other parts too. And do not connect the negative (−) cable to the negative (−) terminal on the dead battery because this can cause sparks. 8. Do not let the - 2012 GMC Sierra | Owner's Manual - Page 478
the good battery. Jumper Cable Removal A. Heavy, Unpainted Metal Engine Part or Remote Negative (−) Terminal B. Good Battery or Remote Positive dead battery. If it will not start after a few tries, it probably needs service. Notice: If the jumper cables are connected or removed in the wrong order, - 2012 GMC Sierra | Owner's Manual - Page 479
ground. Care must be taken with vehicles that have low ground clearance and/or special equipment. Always flatbed on a car carrier. Consult your dealer or a professional towing service if the disabled vehicle must be towed. See Roadside Assistance Program (U.S. and Canada) on page 13‑7 or Roadside - 2012 GMC Sierra | Owner's Manual - Page 480
brake is firmly set before the transfer case is shifted to N (Neutral). 4. Shift the transfer case to N (Neutral). See "Shifting into Neutral" under Four-Wheel Drive on page 9‑40 for the proper procedure to select the Neutral position for the vehicle. Notice: If the vehicle is towed with all four - 2012 GMC Sierra | Owner's Manual - Page 481
is firmly attached to the towing vehicle. 6. Turn the ignition to LOCK/OFF and remove the key - the steering wheel will still turn. After towing, see "Shifting Out of Neutral" under Four-Wheel Drive on page 9‑40 for the proper procedure to take the vehicle out of the Neutral position. 10-95 - 2012 GMC Sierra | Owner's Manual - Page 482
P (Park). 4. Firmly set the parking brake. 6. Secure the vehicle to the dolly following the manufacturer's instructions. 7. Shift the transfer case to N (Neutral). See "Shifting into Neutral" under Four-Wheel Drive on page 9‑40 for the proper procedure to select the neutral position for the vehicle - 2012 GMC Sierra | Owner's Manual - Page 483
vehicle from the rear: 1. Attach the dolly to the tow vehicle following the dolly manufacturer's instructions. Four‐Wheel‐Drive Vehicles 10-97 Use the following procedure to dolly tow a four-wheel-drive vehicle from the rear: 1. Attach the dolly to the tow vehicle following the dolly manufacturer - 2012 GMC Sierra | Owner's Manual - Page 484
cleaning agents as they can damage the vehicle's paint, metal, or plastic parts. If damage occurs, it would not be covered by the vehicle's see "Shifting Out of Neutral" under Four-Wheel Drive on page 9‑40. Finish Care Application of aftermarket clearcoat sealant/wax materials is not recommended. - 2012 GMC Sierra | Owner's Manual - Page 485
coating of wax, rubbed to high polish, is recommended for all bright metal parts. 10-99 Replace the wiper blades if they are worn or damaged. Damage can water, a soft cloth, and a car washing soap to clean exterior lamps and lenses. Follow instructions under "Washing the Vehicle" later in this - 2012 GMC Sierra | Owner's Manual - Page 486
or chrome-plated wheels. Use only approved cleaners. Also, never drive a vehicle with aluminum or chrome-plated wheels through an automatic car wash that front and rear suspension and steering system for damaged, loose, or missing parts or signs of wear. Inspect the power steering for proper hook-up - 2012 GMC Sierra | Owner's Manual - Page 487
extended periods of time. Cleaners may contain solvents that can become concentrated in the interior. Before using cleaners, read and adhere to all safety instructions on the label. While cleaning the 10-101 interior degreasers. For liquid cleaners, use approximately 20 drops per 3.78L (1 gal) of - 2012 GMC Sierra | Owner's Manual - Page 488
To clean, use a terry cloth fabric dampened with water. Wipe droplets left behind with a clean dry cloth. Commercial glass cleaners may be used, if necessary, after cleaning the interior glass with plain water. Notice: To prevent scratching, never use abrasive cleaners on automotive glass. Abrasive - 2012 GMC Sierra | Owner's Manual - Page 489
or saturating leather, especially perforated leather, as well as other interior surfaces, may cause permanent damage. Wipe excess moisture from these with a soft cloth dampened with a mild soap solution. Damage caused by air fresheners would not be covered by the vehicle warranty. 10-103 Care of - 2012 GMC Sierra | Owner's Manual - Page 490
10-104 Vehicle Care Use the following guidelines for proper floor mat usage... Floor Mats Do not place anything on top of the driver side floor mat. Use only a single floor mat on the driver side. Do not place one floor mat on top of another. { WARNING If a floor mat is the wrong size or is not - 2012 GMC Sierra | Owner's Manual - Page 491
technicians who can perform required maintenance using genuine replacement parts. They have up‐to‐date tools and equipment for fast and accurate diagnostics. Many dealers have extended evening and Saturday hours, courtesy transportation, and online scheduling to assist with service needs. Your - 2012 GMC Sierra | Owner's Manual - Page 492
they are not, see your dealer to have a trained technician do the work. See Doing Your Own Service Work on page 10‑4. Mainly driven in heavy city traffic in hot weather. Mainly driven in hilly or mountainous terrain. Frequently towing a trailer. Used for high speed or competitive driving. Used for - 2012 GMC Sierra | Owner's Manual - Page 493
can perform this work. If the engine oil life system is reset accidentally, service the vehicle within 5 000 km/3,000 mi since the last service. Inspect engine air cleaner filter. See Engine Air Cleaner/Filter on page 10‑17. Inspect brake system. . . . Tire Rotation and Required Services Every - 2012 GMC Sierra | Owner's Manual - Page 494
. Replace if needed. Visually inspect gas strut for signs of wear, cracks, or other damage. Check the hold open ability of the strut. See your dealer if service is required. Inspect sunroof track and seal, if equipped. See Sunroof (Crew Cab) on page 2‑23 or Sunroof (Extended Cab) on page 2‑22. Check - 2012 GMC Sierra | Owner's Manual - Page 495
Service and Maintenance 11-5 - 2012 GMC Sierra | Owner's Manual - Page 496
11-6 Service and Maintenance b) Or every four years, whichever comes first. c) Do not for fraying, excessive cracking, or damage; replace, if needed. Footnotes - Maintenance Schedule Additional Required Services - Normal a) Check all fuel and vapor lines and hoses for proper hook‐up, routing, and - 2012 GMC Sierra | Owner's Manual - Page 497
Service and Maintenance 11-7 - 2012 GMC Sierra | Owner's Manual - Page 498
if the vehicle has one, works properly. Replace as needed. c) Or every four years, whichever comes first. Special Application Services . Vehicles with Dual Wheels: Check dual wheel nut torque at 160 km/100 mi, 1 600 km/ 1,000 mi and 9 700 km/6,000 mi. Severe Commercial Use Vehicles Only: Lubricate - 2012 GMC Sierra | Owner's Manual - Page 499
. To maintain vehicle performance, additional maintenance services may be required. It is recommended that your dealer perform these services - their trained dealer to tools and equipment to inspect the brakes and recommend quality parts engineered for the vehicle. . . Fluids Proper fluid levels - 2012 GMC Sierra | Owner's Manual - Page 500
dealer can inspect the hoses and advise if replacement is needed. Lamps Properly working headlamps, taillamps, and brake lamps are important to see and be seen may include steering wheel vibration, bounce/sway while braking, longer stopping distance, or uneven tire wear. As part of the multi‐point - 2012 GMC Sierra | Owner's Manual - Page 501
and Maintenance Wheel Alignment Wheel alignment is critical for ensuring that the tires deliver optimal wear and performance. . 11-11 Windshield For safety, tire wear. Your dealer has the required equipment to ensure proper wheel alignment. Signs of damage include scratches, cracks, and chips. - 2012 GMC Sierra | Owner's Manual - Page 502
11-12 Service and Maintenance Recommended Fluids, Lubricants, and Parts Recommended Fluids and Lubricants This maintenance section applies the DURAMAX® Diesel supplement. Fluids and lubricants identified below by name, part number, or specification can be obtained from your dealer. Usage Engine - 2012 GMC Sierra | Owner's Manual - Page 503
Usage Floor Shift Linkage Chassis Lubrication Front Axle (1500 Series) - Four-Wheel Drive Front Axle (1500, 2500 HD, and 3500 HD Series) Rear Axle Transfer Case (Four-Wheel Drive) Front Axle Propshaft Spline or One-Piece Propshaft Spline (Two-Wheel Drive with 4-Speed Auto. Trans.) Rear Driveline - 2012 GMC Sierra | Owner's Manual - Page 504
Service and Maintenance Usage Hood Hinges Fluid/Lubricant Multi-Purpose Lubricant, Superlube (GM Part No. 12346241, in Canada 10953474). Multi-Purpose Lubricant, Superlube (GM Part Pivot Points, Hinges, Multi-Purpose Lubricant, Superlube (GM Part No. 12346241, in Latch Bolt, and Linkage Canada - 2012 GMC Sierra | Owner's Manual - Page 505
Service and Maintenance 11-15 Maintenance Replacement Parts Replacement parts identified below by name, part number, or specification can be obtained from your dealer. If your vehicle has a diesel engine, see the Duramax diesel supplement for more information. Part Engine Air Cleaner/Filter - 2012 GMC Sierra | Owner's Manual - Page 506
-16 Service and Maintenance Maintenance Records After the scheduled services are performed, record the date, odometer reading, who performed the service, and the type of services performed in the boxes provided. Retain all maintenance receipts. Date Odometer Reading Serviced By Services Performed - 2012 GMC Sierra | Owner's Manual - Page 507
Service and Maintenance Odometer Reading 11-17 Date Serviced By Services Performed - 2012 GMC Sierra | Owner's Manual - Page 508
11-18 Service and Maintenance Odometer Reading Date Serviced By Services Performed - 2012 GMC Sierra | Owner's Manual - Page 509
and Specifications on page 12‑2 for the vehicle's engine code. Vehicle Data Capacities and Specifications ...12-2 Engine Drive Belt Routing ...12-6 Service Parts Identification Label This label, on the inside of the glove box, has the following information: . Vehicle Identification Number (VIN - 2012 GMC Sierra | Owner's Manual - Page 510
information. Application Capacities Metric English For the air conditioning system refrigerant charge amount, see the refrigerant 16.4 qt 16.8 qt Air Conditioning Refrigerant R134a Cooling System 4.3L V6 1500 Series 4.8L V8 1500 Series 5.3L V8 1500 Series 6.0L V8 2500 Series and 3500 Series 6.2L V8 - 2012 GMC Sierra | Owner's Manual - Page 511
V6 4.8L V8; 5.3L V8; 6.0L V8; 6.2L V8 Fuel Tank 1500 Series Standard and Short Box 1500 Series Long Box 2500 Series and 3500 Series Standard Box 2500 Series and 3500 Series Long Box 3500 Series Chassis Cab 3500 Chassis Cab - Front Tank 3500 Chassis Cab - Rear Tank (if equipped) Transfer Case Fluid - 2012 GMC Sierra | Owner's Manual - Page 512
Transmission 4L60-E Electronic Transmission 6-Speed Transmission 6L80-E 6-Speed Transmission 6L90-E 6-Speed Transmission Allison Transmission Fluid - Manual (Drain and Refill) 1500 Series 3500 Series Wheel Nut Torque All capacities are approximate. When adding, be sure to fill to the approximate - 2012 GMC Sierra | Owner's Manual - Page 513
Technical Data Engine Specifications Engine 4.3L V6 (LU3) 4.8L V8 (L20) 5.3L V8 FlexFuel with Active Fuel Management™ (Iron Block) (LMG) 5.3L V8 FlexFuel with Active Fuel Management™(Aluminum Block) (LC9) 6.0L V8 FlexFuel with Active Fuel Management™(Aluminum Block)(LZ1) 6.0L V8 (Iron Block) (L96) - 2012 GMC Sierra | Owner's Manual - Page 514
12-6 Technical Data If the vehicle is a hybrid, see the hybrid supplement for more information. Engine Drive Belt Routing V8 Engines V6 Engines If the vehicle has a diesel engine, see the Duramax diesel supplement for more information. - 2012 GMC Sierra | Owner's Manual - Page 515
GMC. Normally, any concerns with the sales transaction or the operation of the vehicle will be resolved by your dealer's sales or service been reviewed with the sales, service, or parts manager 20 Navigation System ...13-20 Radio Frequency Identification (RFID) ...13-20 Radio Frequency Statement ...13 - 2012 GMC Sierra | Owner's Manual - Page 516
13-2 Customer Information When contacting GMC, remember that your concern will likely be resolved at a dealer in all 50 states and the District of Columbia. Eligibility is limited by vehicle age, mileage, and other factors. General Motors reserves the right to change eligibility limitations and/or - 2012 GMC Sierra | Owner's Manual - Page 517
Arbitration Program. General Motors of Canada Limited has committed to binding arbitration of owner disputes involving factory-related vehicle service claims. The program provides for the review of the facts involved by an impartial third party arbiter, and may include an informal hearing before the - 2012 GMC Sierra | Owner's Manual - Page 518
for support, problem with the transaction, sale, or usage of the vehicle must be handled by your dealer sales or service Model year Brand Vehicle Identification Number (VIN) Mileage Delivery date United States GMC Customer Assistance Center P.O. Box 33172 Detroit, MI 48232-5172 www.GMC.com 1-800-GMC - 2012 GMC Sierra | Owner's Manual - Page 519
Mail Code: CA1-163-005 1908 Colonel Sam Drive Oshawa, Ontario L1H 8P7 www.gmc.ca 1-800-263-3777 (English) 1-800-263-7854 (French) 1-800-263-3830 listed in this section. Customer assistance is available Monday through Friday, 08:00 to 20:00 hours, and Saturdays from 08:00 to 15:00 hours. All e-mail - 2012 GMC Sierra | Owner's Manual - Page 520
com/helpcenter . FAQ (Frequently Asked Questions) Contact Us . Digital owner manual, warranty information, and more. Storage for online service and maintenance records. GMC dealer locator for service nationwide. Exclusive privileges and offers. Recall notices for your specific vehicle. OnStar and - 2012 GMC Sierra | Owner's Manual - Page 521
manual for your vehicle, quickly and easily. Find the GMC-recommended maintenance services of the vehicle Model, year, of the problem . . aftermarket adaptive equipment For Canadian‐purchased vehicles, call 1-800-268-6800. Service is available 24 hours a day, 365 days a year. . Coverage Services - 2012 GMC Sierra | Owner's Manual - Page 522
part of the New Vehicle Limited Warranty. GMC and General Motors of Canada Limited reserve the right to make any changes or discontinue the Roadside Assistance program at any time without notification. GMC and General Motors of Canada Limited reserve the right to limit services rental car. Services - 2012 GMC Sierra | Owner's Manual - Page 523
vehicle mileage and changes in vehicle ownership. For more information about the renewal of this program at the end of its term, contact the GMC Customer program. The services are available at no cost under the terms and conditions of the program. The Roadside Assistance program is not part of, or - 2012 GMC Sierra | Owner's Manual - Page 524
Tire Change: If unable to change a flat tire, Roadside Assistance will provide towing service to the nearest authorized GMC dealership. It is the owner's responsibility for the repair or replacement of the tire. This service is limited to the transfer of the vehicle to the repair facility. Emergency - 2012 GMC Sierra | Owner's Manual - Page 525
vehicle has been repaired, Roadside Assistance will provide bus or commercial airline one-way service (subject to availability) for the person designated by you to , and other cyclonic storms. Vehicle immobilization situations arising from car accidents caused by the driver of the vehicle or third - 2012 GMC Sierra | Owner's Manual - Page 526
E-mail [email protected] GMC reserves the right service, unless, of course, the problem is safety related. If it is, please call your dealership, let them know this, and ask for instructions. If your dealer requests you to bring the vehicle for service, you are urged to do so as early in the work - 2012 GMC Sierra | Owner's Manual - Page 527
extended powertrain, and/or hybrid-specific warranties in both the U.S. and Canada. Several Courtesy Transportation options are available to assist in reducing inconvenience when warranty repairs are required. Courtesy Transportation is not a part shuttle service, the expense must be supported by - 2012 GMC Sierra | Owner's Manual - Page 528
not covered by that warranty. Aftermarket collision parts are also available. These are made by companies other than GM and may not have been tested for the vehicle. As a result, these parts may fit poorly, exhibit premature durability/ corrosion problems, and may not perform properly in subsequent - 2012 GMC Sierra | Owner's Manual - Page 529
use of aftermarket collision parts. Some insurance companies will not specify aftermarket collision parts. When purchasing services for help. Do not leave the scene of a crash until all matters have been taken care of. Move the vehicle only if its position puts you in danger, or you are instructed - 2012 GMC Sierra | Owner's Manual - Page 530
an Airbag Inflates? on page 3‑27. Service Bulletins Service Bulletins give additional technical service information needed to knowledgeably service General Motors cars and trucks. Each bulletin contains instructions to assist in the diagnosis and service of the vehicle. Managing the Vehicle Damage - 2012 GMC Sierra | Owner's Manual - Page 531
plus handling and shipping fees. Without Portfolio: Owner Manual only. RETAIL SELL PRICE: $25.00 (U.S.) plus handling and shipping fees. 13-17 Current and Past Models Technical Service Bulletins and Manuals are available for current and past model GM vehicles. ORDER TOLL FREE: 1-800-551-4123 - 2012 GMC Sierra | Owner's Manual - Page 532
Information However, NHTSA cannot become involved in individual problems between you, your dealer, or General Motors. a situation like this, please notify General Motors. Call 1-800-GMC-8782 (1-800-462-8782), or write: GMC Customer Assistance Center P.O. Box 33172 Detroit, MI 48232-5172 In Canada - 2012 GMC Sierra | Owner's Manual - Page 533
the vehicle. These modules may store data to help your dealer technician service the vehicle. Some modules may also store data about how you operate obstacle, data that will assist in understanding how a vehicle's systems performed. The EDR is designed to record data related to vehicle dynamics and - 2012 GMC Sierra | Owner's Manual - Page 534
20 official request by police or similar government office; as part of GM's defense of litigation through the discovery process navigation manual for information on stored data and for deletion instructions. Radio systems by other than an authorized service facility could void authorization to use - 2012 GMC Sierra | Owner's Manual - Page 535
Directions and Connections service plan. . OnStar Services Emergency ...Security ...Navigation Emergency, Security, Navigation, Connection, and Diagnostic Services. The OnStar system status light is next Requires the available Directions and Connections service plan. Receive On-Demand Diagnostics - 2012 GMC Sierra | Owner's Manual - Page 536
1. Push Q to connect to a live Advisor. 2. Request directions. 3. Directions are downloaded to the vehicle. 4. Follow the voice-guided commands. Security OnStar provides services like Stolen Vehicle Assistance, Remote Ignition Block, and Roadside Assistance, if the vehicle is equipped with these - 2012 GMC Sierra | Owner's Manual - Page 537
System responds with miles to the destination, then responds with "OnStar ready," then a tone. 3. Say "Goodbye." Exits voice commands. 14-3 Other Navigation Services Available from OnStar OnStar eNav: Allows subscribers to send destinations from Google Maps and MapQuest.com to their Turn-by-Turn - 2012 GMC Sierra | Owner's Manual - Page 538
mobile app can be downloaded. The vehicle can be remote started, if equipped, or the doors can be unlocked from anywhere there is cell phone service. It can also check the fuel level, tire pressure, and oil life. It can connect to an OnStar Advisor anytime. For OnStar mobile app compatibility - 2012 GMC Sierra | Owner's Manual - Page 539
OnStar 14-5 Diagnostics OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the the vehicle, requesting updated account information. How OnStar Service Works Automatic Crash Response, Emergency Services, Crisis Assist, Stolen Vehicle Assistance, Vehicle Diagnostics, - 2012 GMC Sierra | Owner's Manual - Page 540
it has not been properly maintained. If equipment or software is added, connected, or modified, OnStar service may not work. Other problems beyond OnStar 's control may prevent service such as hills, tall buildings, tunnels, weather, electrical system design and architecture of the vehicle, damage - 2012 GMC Sierra | Owner's Manual - Page 541
OnStar Warranty OnStar equipment may be warranted as part of the new-vehicle limited warranty. The Advisors can speak French or Spanish. Potential Issues Some OnStar services are disabled after five days. OnStar cannot perform Remote Door Unlock or Stolen Vehicle Assistance after the vehicle has - 2012 GMC Sierra | Owner's Manual - Page 542
-on Electrical Equipment The OnStar system is integrated into the electrical architecture of the vehicle. Do not add any electrical equipment. See Add-On Electrical Equipment on page 9‑105. Added electrical equipment may interfere with the operation of the OnStar system and cause it to not operate - 2012 GMC Sierra | Owner's Manual - Page 543
Accessory Power ...9-29 Active Fuel Management® ...9-32 Add-On Electrical Equipment ...9-105 Adding a Snow Plow or Similar Equipment ...9-106 Additional Information, OnStar® ...14-5 Adjustable Throttle and Brake Pedal ...9-25 Adjustments Lumbar, Front Seats ...3-4 Air Servicing 98 Interior ...10 - 2012 GMC Sierra | Owner's Manual - Page 544
Lamps ...10-40 Taillamps ...10-40 Taillamps, Turn Signal, Stoplamps, and Back-up Lamps ...10-41 Buying New Tires ...10-68 Automatic Transmission Manual Mode ...9-38 Shift Lock Control Function Check ...10-35 Auxiliary Devices ...7-32 Roof Mounted Lamp ...6-6 Axle, Front ...10-31 Axle, Rear ...10-32 - 2012 GMC Sierra | Owner's Manual - Page 545
iv CD Player ...7-15 CD/DVD Player ...7-21 Center Console Storage ...4-2 Center High-Mounted Stoplamp (CHMSL) and Cargo 10-98 Interior Care ...10-101 Climate Control Systems ...8-1, 8-4 Air Conditioning ...8-1, ) Users ...13-6 Customer Information Service Publications Ordering Information ...13-16 - 2012 GMC Sierra | Owner's Manual - Page 546
...9-71 Electrical Equipment, Add-On ...9-105 Electrical System Engine Compartment Fuse Block ...10-44 Fuses and Circuit Breakers ...10-44 Instrument Panel Fuse Block ...10-48 Overload ...10-43 Emergency, OnStar® ...14-2 Engine Air Cleaner/Filter ...10-17 Check and Service Engine Soon Light ...5-22 - 2012 GMC Sierra | Owner's Manual - Page 547
Extender, Safety Belt ...3-20 Exterior Lamp Controls ...6-1 Exterior Lamps Off Reminder ...6-2 i-5 F Fan Engine ...10-24 Fast Idle System ...9-29 Features Memory ...1-14 Filter, Engine Air ...6-6 Folding Mirrors ...2-16 Four-Wheel Drive ...9-40, 10-30 Four-Wheel-Drive Light ...5-26 Front Axle - 2012 GMC Sierra | Owner's Manual - Page 548
Odometer ...5-13 Speedometer ...5-13 Tachometer ...5-13 Trip Odometer ...5-13 Voltmeter ...5-16 Warning Lights and Indicators ...5-11 General Information Service and Maintenance ...11-1 Towing ...9-74 Vehicle Care ...10-2 Glass Replacement ...10-37 Glove Box ...4-1 GM Mobility Reimbursement Program - 2012 GMC Sierra | Owner's Manual - Page 549
INDEX Heating and Air Conditioning ...8-1, 8-4 High-Beam On Light ...5-29 High-Speed Operation ...10-60 Highway ...6-8 Taillamps ...10-40 Lap Belt ...3-19 Lap-Shoulder Belt ...3-14 LATCH System Replacing Parts after a Crash ...3-55 LATCH, Lower Anchors and Tethers for Children ...3-47 Lighter, - 2012 GMC Sierra | Owner's Manual - Page 550
System) ...3-47 Lumbar Adjustment ...3-4 Front Seats ...3-4 Manual Mode ...9-38 Manual Windows ...2-19 Memory Features ...1-14 Memory Seats ...3-7 22 Cruise Control ...5-30 Engine Oil Pressure ...5-28 Flash-to-Pass ...6-3 Four-Wheel-Drive ...5-26 Front Fog Lamp ...5-29 High-Beam On ...5-29 High/Low - 2012 GMC Sierra | Owner's Manual - Page 551
14 Folding ...2-16 Heated ...2-17 Manual ...2-14 Manual Rearview ...2-18 Park Tilt ...2-17 ...14-2 Vehicle Data Recording and Privacy ...13-20 New Vehicle Break-In ...9-25 Noise Control System ...1-37 Operation, Infotainment System ...7-3 Ordering Service Publications ...13-16 Outlets Power ...5-9 - 2012 GMC Sierra | Owner's Manual - Page 552
and Fender Marker Lamps ...10-40 Pickup Conversion to Chassis Cab ...9-109 Power Door Locks ...2-8 Mirrors ...2-15 Outlets ...5-9 Protection, Battery ...6-10 Retained Accessory (RAP) ...9-29 R Radio Frequency Identification (RFID) ...13-20 Statement ...13-20 Radios AM-FM Radio ...7-9 CD/DVD - 2012 GMC Sierra | Owner's Manual - Page 553
LATCH System Parts after a Crash ...3-55 Replacing Safety Belt System Parts after a ...9-34 i-11 S Safety Belts ...3-12 Care ...3-20 Extender ...3-20 How to Wear Safety Belts Properly ...3-13 Lap -2 Vehicle ...2-11 Service Accessories and Modifications ...10-3 Doing Your Own Work ...10-4 Engine - 2012 GMC Sierra | Owner's Manual - Page 554
...10-41 Storage Areas Center Console ...4-2 Glove Box ...4-1 Instrument Panel ...4-1 Stuck Vehicle ...9-15 Sun Visors ...2-21 Sunroof ...2-22, 2-23 Switches Airbag On-Off ...3-29 Symbols ...iv System Infotainment ...7-1 Noise Control ...10-34 Service (cont'd) Parts Identification Label ...12 - 2012 GMC Sierra | Owner's Manual - Page 555
55 Uniform Tire Quality Grading ...10-70 Wheel Alignment and Tire Balance ...10-72 Wheel Replacement ...10-72 When It Is Time Courtesy ...13-13 Trip Odometer ...5-13 Truck-Camper Loading Information ...9-23 Turn and ...5-61 Programming ...5-56 Using This Manual ...iv V Vehicle Canadian Owners ... - 2012 GMC Sierra | Owner's Manual - Page 556
i-14 INDEX Windows ...2-19 Manual ...2-19 Power ...2-20 Rear ...2-21 Windshield Wiper/Washer ...5-4 Winter Driving ...9-13 Wiper Blade Replacement ...10-36 Vehicle Care Tire Pressure ...10-58 Ventilation, Air ...8-10 Visors ...2-21 Voltmeter Gauge ...5-16 W Warning Brake System Light ...5-25