GM Service Manual Online
For 1990-2009 cars only

Compass Operation

Press to turn the compass on or off.

Turn the ignition and compass feature on. After a few seconds, the mirror displays the current compass direction.

Compass Calibration

If after a few seconds the display does not show a compass direction, (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, note pad holder, or similar object. If the letter C appears in the compass window, the compass may need to be reset or calibrated.

Calibrate the compass 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 zone map that follows.

  2. Object Number: 806305  Size: B4
  3. Press and hold until a zone number displays.
  4. Once the zone number displays, press repeatedly until the correct zone number if reached. If C appears in the compass window, the compass may need calibration. See "Compass Calibration" listed previously.