Compass Variance (Zone); Compass Calibration - GMC 2013 Savana Owner's Manual

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 until PRESS
CHANGE COMPASS ZONE
displays.
2. Find the vehicle's current
location and variance zone
number on the map.
Zones 1 through 15 are
available.
3. Press to scroll through and
select the appropriate
variance zone.
TO
4. Press
heading, for example, N for
North, is displayed in the DIC.
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.
Instruments and Controls
until the vehicle
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.
If the DIC display does not show a
heading, for example, N for North,
or the heading does not change
after making turns, there may be a
strong magnetic field interfering with
the compass. Such interference
may be caused by a magnetic CB or
cell phone antenna mount, a
magnetic emergency light, magnetic
note pad holder, or any other
magnetic item. Turn off the vehicle,
move the magnetic item, then turn
on the vehicle and calibrate the
compass.
5-5