Buick 2009 Enclave - Manual (Page 167)

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
V TO
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 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.
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.
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.
Instrument Panel 3-49