2012 GMC Sierra Owner's Manual - Page 61

Keys, Doors, and Windows Manual Folding If equipped with manual folding mirrors, push the mirror toward the vehicle. Push the mirror outward, to 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 The vehicle may also have a turn signal indicator on the mirror. An arrow on the mirror flashes in the direction of the turn or lane change. Park Tilt Mirrors If the vehicle has the memory package, the passenger and/or driver mirror tilts to a preselected position when the vehicle is in R (Reverse). This feature lets the driver view the curb when parallel parking. The mirror(s) return to the original position when the vehicle is shifted out of R (Reverse), or the ignition is turned off or to OFF/LOCK. Turn this feature on or off through the Driver Information Center (DIC). See Vehicle Personalization (With DIC Buttons) on page 5‑48 for more information. Heated Mirrors For vehicles with heated mirrors: Automatic Dimming If equipped with an automatic dimming mirror, the driver outside mirror automatically dimes for the glare of the headlamps from behind. This feature is controlled by the on and off setting on the inside rearview mirror. See Automatic Dimming Rearview Mirror on page 2‑18. 1 (Rear Window Defogger): Press to heat the mirrors. If the vehicle has a towing mirror, only the upper glass of the mirror is heated. The lower convex part of the towing mirror is not heated. Depending on the vehicle's features, see "Rear Window Defogger" under Climate Control Systems (with Air Conditioning) on page 8‑1 or Climate Control Systems (with Heater Only) on page 8‑4 or Dual Automatic Climate Control System on page 8‑5 for more information.