Compass Calibration
WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
The DIC compass is self-calibrating. However, the compass may need to be recalibrated once it travels outside a specific geographic zone. For compass calibrations and zones refer to: Electronic Compass Calibration in Instrument Panel, Gages, and Console.