2014 Chevrolet Silverado 3500 HD Crew Cab Owner Manual - Page 299

Driving and Operating increase in the effort to shift out of P (Park). See "Torque Lock" under Shifting Into Park on page 9-28 for more information. 9-33 { Warning If you have four-wheel drive, the vehicle will be free to roll - even if the shift lever is in P (Park) - if the transfer case is in N (Neutral). So, be 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 N (Neutral). See Shifting Into Park on page 9-28. R (Reverse): Use this gear to back up. Notice: Shifting to R (Reverse) while the vehicle is moving forward could damage the transmission. The repairs would not be covered by the vehicle warranty. Shift to R (Reverse) only after the vehicle is stopped. To rock the vehicle back and forth to get out of snow, ice, or sand without damaging the transmission, see If the Vehicle Is Stuck on page 9-13. Hydra-Matic® 4-Speed Automatic Transmission { Warning It is dangerous to get out of the vehicle if the shift lever is not fully in P (Park) with the parking brake firmly set. The vehicle can roll. Do not leave the vehicle when the engine is running. If you have left the engine running, the vehicle can move suddenly. You or others could be injured. To be sure the vehicle will not move, even when you are on fairly level ground, always set the parking brake and move the shift lever to P (Park). See Shifting Into Park on page 9-28 and Driving Characteristics and Towing Tips on page 9-73. Heavy Duty 6-Speed Automatic Transmission Shown (Light Duty 6-Speed Similar) See "Range Selection Mode" under Manual Mode on page 9-36. 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 parked on a hill, especially when the vehicle has a heavy load, you might notice an