2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 199

Outside Towing Mirrors Outside Power Mirrors Vehicles with outside power mirrors have controls located on the driver door. 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 a trailer. Manually fold the mirrors forward or rearward. The lower portion of the mirror is convex. A convex mirror's surface is curved to see more from the driver seat. The convex mirror can be adjusted manually to the driver preferred position for better vision. The mirror may have a turn signal arrow that flashes in the direction of the turn or lane change. To adjust each mirror: 1. Press (A) or (B) to select the driver or passenger side mirror. 2. Press one of the four arrows located on the control pad to adjust the mirror. 3. Adjust the outside mirror so that the side of the vehicle and the area behind are seen. 4. Press either (A) or (B) again to deselect the mirror. Manually fold the mirrors inward to prevent damage when going through an automatic car wash. To fold, push the mirror toward the vehicle. Push the mirror outward, to return to its original position. 3-61