For 1990-2009 cars

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/retailer for more information about OnStar® and how to subscribe to it. See OnStar® System for more information about the services OnStar® provides.

(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) for more information.

If the vehicle has RVC, the auto dimming feature does not work and the button will not be available.

### 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.