Temperature And Compass Display - Chevrolet 2008 Avalanche Owner's Manual

Temperature and Compass Display

Press the on/off button, located on the far left of the
mirror face, to turn the compass/temperature display
on or off.
If the display reads CAL, the compass needs to be
calibrated. For more information, see "Compass
Calibration" following.
To adjust between Fahrenheit and Celsius, do the
following:
1. Press and hold the on/off button until either a
flashing F or C appears.
2. Press the button again to change the display to the
desired unit of measurement. After approximately
four seconds of inactivity, the new unit will be locked
in and the compass/temperature display will return.
If an abnormal temperature reading is displayed for an
extended period of time, please see your GM dealer.
Under certain circumstances, a delay in updating
the temperature is normal.
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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 is 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 Variance
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 outside of zone
eight. Under certain circumstances, as during a long
distance cross-country trip, it will be necessary to adjust
for compass variance. Compass variance is the
difference between earth's magnetic north and true
geographic north. If not adjusted to account for compass
variance, the compass could give false readings.