GM Service Manual Online
For 1990-2009 cars only

Your vehicle may have this mirror. When on, an automatic dimming mirror will dim to the proper level to minimize glare from lights behind you after dark.

The mirror also includes a dual display in the upper right corner of the mirror with the compass reading and the outside temperature.

Briefly press this button to turn the display on or off.

Temperature Display

The temperature can be displayed by pressing the compass/temperature button. Pressing the compass/temperature button once briefly, will toggle the display reading on and off. To alternate the temperature reading between Fahrenheit and Celsius, press and hold the compass/temperature button for approximately three seconds until the display blinks F and C. After approximately five seconds of inactivity, the display will stop blinking and display the last selection made.

If an abnormal temperature reading is displayed for an extended period of time, see your dealer. Under certain circumstances, a delay in updating the temperature is normal.

Automatic Dimming Mirror Operation

On/Off: Press this button to turn the automatic dimming feature on or off. The indicator light to the left of the button will turn on to indicate when the feature is on. Once the mirror is turned off, it will remain off until it is turned back on, or until the vehicle is restarted.

Compass Operation

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

Compass Calibration

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

Compass Variance

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

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.