GM Service Manual Online
For 1990-2009 cars only

Compass Operation

There is a compass display in the upper right corner of the mirror.

Press or depending on the mirror, press COMP to turn the compass on or off.

Compass Calibration

The compass may need calibration if:

    • After several seconds, the display does not show a compass heading (N for North, for example), there may be a strong magnetic field interfering with the compass. Interference can be caused by a magnetic antenna mount, magnetic note pad holder or a similar magnetic item.
    • 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, press and hold or depending on the mirror, press COMP until CAL displays.

The compass can be calibrated by driving the vehicle in circles at 5 mph (8 km/h) or less until the display reads a direction.

Compass Variance

The mirror is set to zone eight. If you do not live in zone eight or drive out of the area, the compass variance needs to be changed to the appropriate zone.

To adjust for compass variance:

  1. Find your current location and variance zone number on the following zone map.

  2. Object Number: 806305  Size: B4
  3. Press and hold or depending on the mirror, press COMP until a Z and/or a zone number displays. The compass is now in zone mode.
  4. Keep pressing until the desired zone number displays. Release the button. After several seconds of inactivity, the new zone number locks in and the compass display returns.
  5. Calibrate the compass as previously described.