2010 GMC Acadia Owner's Manual - Page 48

2-18 Keys, Doors and Windows Automatic Dimming Feature The driver outside mirror adjusts for the glare of the headlamps behind you. See Automatic Dimming Rearview Mirror on page 2‑19 for information on how to turn this feature on. Resetting the Power Foldaway Mirrors Reset the power foldaway mirrors if: . Park Tilt Mirrors If the vehicle has the memory package, the outside mirrors have a park tilt feature. This feature tilts the outside mirrors to a preselected position when the vehicle is in R (Reverse). This allows the driver to view the curb for parallel parking. The passenger and/or driver mirror returns to its original position when the vehicle is shifted out of R (Reverse), or the ignition is turned off or to OFF/LOCK. This feature can be turned on or off through the Driver Information Center (DIC). See Vehicle Personalization (With DIC Buttons) on page 5‑45 for more information. The mirrors are accidentally obstructed while folding. They are accidentally manually folded/unfolded. The mirrors vibrate at normal driving speeds. . . Turn Signal Indicator The vehicle may have a turn signal indicator lamp that is built into the mirror housing. The turn signal lamp flashes with the use of the vehicle's turn signal and hazard flashers. Fold and unfold the mirrors one time using the mirror controls to reset them to their normal position. A popping noise may be heard during the resetting of the power foldaway mirrors. This sound is normal after a manual folding operation. Heated Mirrors For vehicles with heated mirrors: < (Rear Window Defogger): Press to heat the mirrors. See "Rear Window Defogger" under Dual Automatic Climate Control System on page 8‑4 for more information.