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Compass Calibration

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure mirror has correct compass variation zone number. See COMPASS MAGNETIC VARIATION ADJUSTMENT .
  2. Start engine. Locate compass switch button. Depending on mirror model, switch button will be marked with COMP, COMPASS or ON/OFF. Press and hold switch button until "C" or "CAL" is displayed in mirror.
  3. Drive vehicle in circles at a speed less than 5 mph (8 km/h) until "C" or "CAL" is replaced by a proper vehicle heading. Calibration is complete.
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