GMC 2007 Envoy - Manual (Page 143)

3. Press the COMP button on the bottom of the
mirror until the new zone number appears in
the display. After you stop pressing the
button, the display will show a compass
direction within a few seconds.
Passenger Airbag Indicator
The mirror may be equipped with a passenger
airbag indicator on the mirror glass, just above the
buttons. If the vehicle has this feature the mirror
will display the word ON, or an airbag symbol
in Canada, when the passenger airbag is enabled.
For more information see Passenger Sensing
System on page 82.
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.
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