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.

Your vehicle may also have a Rear Vision Camera. See Rear Vision Camera (RVC)

Automatic Dimming Mirror Operation

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.

Temperature Display

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

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

Compass Operation

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

Compass Calibration

The compass may need calibration if the following occurs:

    • The compass does not display the correct heading and the compass zone variance is set correctly.

In order to calibrate, CAL must be displayed in the mirror compass windows. If CAL is not displayed, push in the compass/temperature button for approximately eight seconds or until CAL is displayed.

The compass can only be calibrated by driving the vehicle forward in circles at 5 mph (8 km/h) or less until the display reads a direction. Do not attempt to calibrate the compass by driving in reverse.

Compass Variance

The mirror is set in zone eight upon leaving the factory. It will be necessary to adjust the compass to compensate for compass variance if you live outside zone eight. Under certain circumstances, as during a long distance cross-country trip, it will be necessary to adjust for compass variance. Compass variance is the difference between earth's magnetic north and true geographic north. If not adjusted to account for compass variance, your compass could give false readings.

To adjust for compass variance:

  1. Find your current location and variance zone number on the following zone map.
  2. Press and hold the compass/temperature button for five seconds until a zone number appears in the display.

  3. Object Number: 806305  Size: B4

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.