The vehicle may have an inside rearview mirror with automatic dimming and OnStar® controls; or it may have OnStar® and a compass display. See OnStar® System and/or Compassfor more information.
(On/Off): Press to turn the dimming feature on or off.Automatic dimming reduces the glare of lights from behind the vehicle. The dimming feature comes on and the indicator light illuminates each time the vehicle is started.
Do not spray glass cleaner directly on the mirror. Use a soft towel dampened with water.