2010 Chevrolet Malibu Owner's Manual - Page 145

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. The mirror can be calibrated by driving the vehicle very slowly, in circles, until the display reads a direction. To adjust for compass variance: 1. Find your current location and variance zone number on the zone map that follows. Compass Variance The mirror is set in zone eight. It is necessary to adjust the compass to compensate for compass variance if the vehicle is driven outside zone eight. Under certain circumstances, such as a long distance, cross-country trip, it is necessary to adjust the compass variance. 2. Press and hold 3. O until a zone number displays. Once the zone number displays, press O repeatedly until the correct zone number is reached. If C appears in the compass window, the compass may need calibration. See "Compass Calibration" listed previously. 3-37