Buick 2007 Rainier - Manual (Page 126)

Automatic Dimming Rearview Mirror
with Compass
Your vehicle may have an automatic-dimming
rearview mirror with a compass.
O (On/Off): This is the on/off button for the
automatic dimming feature and compass.
Automatic Dimming Mirror Operation
The automatic dimming mirror function is turned on
automatically each time the ignition is started.
To operate the automatic dimming mirror, do the
following:
1. Make sure the green indicator light, located to
the left of the on/off button, is lit. If it’s not,
press and hold the on/off button until the green
light comes on, indicating that the mirror is
in automatic dimming mode.
2. Turn off the automatic dimming mirror function
by pressing and holding the on/off button until
the green indicator light turns off.
Compass Operation
Press the on/off button once to turn the compass
on or off.
There is a compass display in the window in the
upper right corner of the mirror face. The compass
displays a maximum of two characters. For
example, “NE” is displayed for north-east.
Compass Calibration
Press and hold the on/off button to activate the
compass calibration mode. CAL will be displayed
in the compass window on the mirror.
The compass can be calibrated by driving the
vehicle in circles at 5 mph (8 km/h) or less until the
display reads a direction.
Compass Variance
Compass variance is the difference between earth’s
magnetic north and true geographic north. The
mirror is set to zone eight upon leaving the factory.
It will be necessary to adjust the compass to
compensate for compass variance if you live
outside zone eight. Under certain circumstances,
such as during a long distance cross-country trip, it
will be necessary to adjust for compass variance.
If not adjusted to account for compass variance,
your compass could give false readings.
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