Compass Calibration - Buick 2011 Lucerne Owner's Manual

Compass Calibration

Press and hold to activate the compass calibration
mode. CAL displays in the compass window on the
mirror.
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 CAL
displays in the compass window, the compass may
need to be reset or calibrated.
The compass can be calibrated by driving the vehicle in
circles at 5 mph (8 km/h) or less until the display reads a
direction.
Compass Variance
The compass is set to zone eight. If you do not live in
zone eight or drive out of the area, the compass
variance needs to be changed to the appropriate zone.
To adjust for compass variance:
1. Find your current location and variance zone
number on the following zone map.
3-30
2. Press and hold until the zone number displays.
The number shown is the current zone number.
3. Once the zone number displays, press
repeatedly until the correct zone number displays.
Stop pressing the button and the mirror returns to
normal operation. If CAL appears in the compass
window, the compass may need calibration. See
Compass Calibration listed previously.