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Compass Variance
Compass variance is the difference between earth’s
magnetic north and true geographic north. If the
mirror is not adjusted for compass variance, the
compass could give false readings.
The mirror is set in zone eight upon leaving the
factory. It will be necessary to adjust the compass
to compensate for compass variance if the
vehicle is driven outside zone eight. Under
certain circumstances, such as a long distance,
cross-country trip, it will be necessary to adjust the
compass variance.
To adjust for compass variance, do the following:
1. Find your current location and variance
zone number on the zone map. See Automatic
Dimming Rearview Mirror with OnStar
®
and
Compass on page 130 for map information.
2. Press and hold the on/off button until a zone
number appears on the display.
3. Once the zone number appears on the display,
press the on/off button quickly until you reach
the correct zone number. If C or CAL appears
in the compass window, the compass may
need calibration. See “Compass Calibration”
listed previously.
Outside Power Mirrors
The controls for the
outside power mirrors
are located on the
driver’s door armrest.
Press the left or right side of the selector switch
located beneath the control pad to choose the left
or right mirror.
To adjust the mirror, press one of the four arrows
located on the control pad to move the mirror
in the direction you want it to go. Adjust each
outside mirror so that you can see a little of your
vehicle, and the area behind your vehicle.
The mirrors may also have an arrow that flashes
when the turn signal is used. See Turn and
Lane-Change Signals on page 162.
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