Compass Zone - GMC Yukon Owner's Manual

Compass Zone

The zone is set to zone eight upon leaving the factory.
Your dealer will set the correct zone for your location.
Under certain circumstances, such as during a long
distance cross-country trip or moving to a new state
or province, it will be necessary to compensate for
compass variance by resetting the zone through the
DIC if the zone is not set correctly.
Compass variance is the difference between the earth's
magnetic north and true geographic north. If the
compass is not set to the zone where you live, the
compass may give false readings. The compass must
be set to the variance zone in which the vehicle is
traveling.
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 TO CHANGE COMPASS ZONE
displays. Or, if the vehicle does not have DIC
buttons, press the trip odometer reset stem until
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.
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