Compass Calibration; Passenger Air Bag Indicator; Cleaning The Mirror - GMC 2004 Yokon Denali Owner's Manual

3. Keep pressing the on/off button until the desired
zone number appears in the display. Release the
button. After approximately four seconds of
inactivity, the new zone number will be locked in
and the compass/temperature display will return.
4. Calibrate the compass as described below.

Compass Calibration

The compass may need calibration if one of the
following occurs:
•
After approximately five seconds, the display does
not show a compass heading (N for North, for
example), there may be a strong magnetic field
interfering with the compass. Such interference may
be caused by a magnetic antenna mount, magnetic
note pad holder or a similar magnetic item.
•
The compass does not display the correct heading
and the compass zone variance is set correctly.
2-34
In order to calibrate, CAL must be displayed in the
mirror compass windows. If CAL is not displayed, push
the on/off button for approximately 12 seconds or
until CAL is displayed.
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.

Passenger Air Bag Indicator

Your vehicle may be equipped with a passenger air bag
indicator, on the mirror glass, just above the buttons.
For more information, see Passenger Sensing System
on page 1-86.

Cleaning the Mirror

When cleaning the mirror, use a paper towel or similar
material dampened with glass cleaner. Do not spray
glass cleaner directly on the mirror as that may cause
the liquid cleaner to enter the mirror housing.