GM Service Manual Online
For 1990-2009 cars only

Your vehicle may have an automatic dimming rearview mirror with a compass display.

The mirror includes an eight-point compass display in the upper right corner of the mirror face. When on, the compass automatically calibrates as the vehicle is driven.

Mirror Operation

(On/Off): Press and hold the button, located on the lower left side of the mirror face, for about three seconds to turn the automatic dimming feature on or off. The indicator light will illuminate when this feature is active. The automatic dimming feature is active each time the vehicle is started.

Compass Operation

Press the on/off button once to turn the compass on or off.

When the ignition and the compass feature are on, the compass will show two character boxes for about two seconds. After two seconds, the mirror will display the compass heading.

Compass Calibration

See "Compass Calibration" under Automatic Dimming Rearview Mirror with OnStar® and Compass for more information.

Compass Variance

See "Compass Variance" under Automatic Dimming Rearview Mirror with OnStar® and Compass for more information.

Cleaning the Mirror

When cleaning the mirror, use a paper towel or similar material dampened with glass cleaner. Do not spray glass cleaner directly on the mirror as that may cause the liquid cleaner to enter the mirror housing.