GM Service Manual Online
For 1990-2009 cars only

DIC Compass Uplevel DIC

Your vehicle may have a compass in the Driver Information Center (DIC).

Compass Zone

The zone is set to zone eight upon leaving the factory. Your dealer/retailer will set the correct zone for your location.

Under certain circumstances, such as during a long distance cross-country trip or moving to a new state or province, it will be necessary to compensate for compass variance by resetting the zone through the DIC if the zone is not set correctly.

Compass variance is the difference between the earth's magnetic north and true geographic north. If the compass is not set to the zone where you live, the compass may give false readings. The compass must be set to the variance zone in which the vehicle is traveling.

Compass Calibration

The compass can be manually calibrated. Only calibrate the compass in a magnetically clean and safe location, such as an open parking lot, where driving the vehicle in circles is not a danger. It is suggested to calibrate away from tall buildings, utility wires, manhole covers, or other industrial structures, if possible.

If the DIC display does not show a heading, for example, N for North, or the heading does not change after making turns, there may be a strong magnetic field interfering with the compass. Such interference may be caused by a magnetic CB or cell phone antenna mount, a magnetic emergency light, magnetic note pad holder, or any other magnetic item. Turn off the vehicle, move the magnetic item, then turn on the vehicle and calibrate the compass.

To adjust for compass variance and to calibrate the compass, use the following procedure:

Compass Variance (Zone) and Calibration Procedure

  1. Do not set the compass zone when the vehicle is moving. Only set it when the vehicle is in PARK (P).
  2. Press the options button until COMPASS CALIBRATION MODE displays.


    Object Number: 1911674  Size: B4
  3. Find the vehicle's current location and variance zone number on the map.
  4. Zones 1 through 15 are available.

  5. Press the set/reset button to scroll through and select the appropriate variance zone.
  6. Press the options button to advance to the calibration screen.
  7. Do not operate any switches such as window, sunroof, climate controls, seats, etc. during the calibration procedure.

  8. The DIC will display COMPASS CALIBRATION MODE - DRIVE CAR IN CIRCLE. Drive the vehicle in tight circles at less than 5 mph (8 km/h) to complete the calibration.

The direction the vehicle is moving will be displayed in the bottom left corner of the screen, and will appear in the gages, fuel, trip, and some of the options modes.