Compass Calibration
Before calibrating the compass, drive the vehicle to a area that is
magnetically clean (free of large metallic objects). Also make sure there
is no magnetic objects on the inside or outside of the vehicle close to
the mirror.
- Start the engine.
- Press and hold the COMP switch (on/off switch if equipped with
OnStar® controls) until the letter "C" or "Cal"
is displayed.
- Drive the vehicle in circles at a speed of less than 8 km/h
(5 mph) until the letter "C" or "Cal" is replaced
by a proper vehicle heading. The calibration procedure is now complete.
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.
World Magnetic Variation Map
- Locate your current geographic location. Refer to the variation zone
map.
- Turn ON the ignition, with the engine OFF.
- Press and hold the COMP switch (on/off switch if equipped with
OnStar® controls) until a zone number appears on the compass display.
- Depress the COMP switch (on/off switch if equipped with OnStar®
controls) to change the compass to the desired zone.
- After selecting your zone number, the display will show a compass
heading after approximately 5 seconds.