GMC Yukon 2012 Owner's Manual page 139

To adjust for compass variance, use
the following procedure:
Compass Variance (Zone)
Procedure
1. Do not set the compass zone
when the vehicle is moving.
Only set it when the vehicle is
in P (Park).
Press the vehicle information
button until PRESS
CHANGE COMPASS ZONE
displays. Or, if the vehicle does
not have DIC buttons, press the
trip odometer reset stem until
CHANGE COMPASS ZONE
displays.
TO
2. Find the vehicle's current
location and variance zone
number on the map.
Zones 1 through 15 are
available.
3. Press the set/reset button to
scroll through and select the
appropriate variance zone.
4. Press the trip/fuel button until
the vehicle heading, for
example, N for North, is
displayed in the DIC.
Instruments and Controls
Or, if the vehicle does not have
DIC buttons, press and hold the
trip odometer reset stem for
two seconds to select the next
available variance zone. Repeat
this step until the appropriate
variance zone is displayed.
5. If calibration is necessary,
calibrate the compass.
See Compass Calibration
Procedure following.
Compass Calibration
The compass can be manually
calibrated. Only calibrate the
compass in a magnetically clean
and safe location, such as an
open parking lot, where driving the
vehicle in circles is not a danger.
It is suggested to calibrate away
from tall buildings, utility wires,
manhole covers, or other industrial
structures, if possible.
If CAL should ever appear in the
DIC display, the compass should
be calibrated.
5-7