Compass Magnetic Variation Adjustment

Magnetic variation adjustments are required when the compass displays a constant error in heading. Variation is the difference between magnetic north and true north due to geographical location.

Fig 1: World Magnetic Variation Map

Courtesy of GENERAL MOTORS CORP.

1. Locate your current geographic location on the World Magnetic Variation Map.
2. Turn ON the ignition, with the engine OFF.
3. Press and hold both map light switches or the on/off switch (w/UE1) until a zone number appears on the compass display.
4. Depress either map lamp switches or the on/off switch (w/UE1) to select the desired zone number.
5. Wait 5 seconds, the display will return to a compass heading. The variance procedure is now complete.