2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 198

Mirrors Manual Rearview Mirror Hold the inside rearview mirror in the center to move it for a clearer view behind your vehicle. Adjust the mirror to avoid glare from the headlamps behind you. Push the tab forward for daytime use and pull it for nighttime use. Automatic Dimming Mirror Operation Automatic dimming reduces the glare from the headlamps of the vehicle behind you. The dimming feature comes on and the indicator light illuminates each time the ignition is turned to start. Cleaning the Mirror Do not spray glass cleaner directly on the mirror. Use a soft towel dampened with water. Automatic Dimming Rearview Mirror The vehicle may have an automatic dimming inside rearview mirror. Vehicles with OnStar® have three additional control buttons for the OnStar® system. See your dealer for more information about OnStar® and how to subscribe to it. See the OnStar® owner guide for more information about the services OnStar® provides. Outside Manual Mirrors Adjust the outside mirror for a clearer view. 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. Using hood-mounted air deflectors and add-on convex mirror attachments could decrease mirror performance. O (On/Off): Press to turn the dimming feature on or off. The vehicle may also have a Rear Vision Camera (RVC). See Rear Vision Camera (RVC) on page 3‑67 for more information. If the vehicle has RVC, the available. O button may not be 3-60