Automatic Dimming Rearview Mirror With Compass And Temperature Display - GMC Sierra Classic 2007 Owner's Manual

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 Airbag Indicator
The vehicle 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 99.
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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Automatic Dimming Rearview
Mirror with Compass and
Temperature Display
If the vehicle is equipped with an automatic mirror, it
will, when on, automatically dim to the proper level
to minimize glare from lights behind you after dark.
The mirror also includes a display in the upper
right corner of the mirror face. The compass
reading and the outside temperature will both
appear in the display at the same time. The dual
display can be turned on or off by briefly
pressing either the TEMP or the COMP button.
Temperature Display
The temperature can be displayed by pressing the
TEMP button. Pressing the TEMP button once
briefly, will toggle the temperature reading on and
off. To alternate the temperature reading between
Fahrenheit and Celsius, press and hold the TEMP
button for approximately four seconds until the
display blinks F and C. Press and release the
TEMP button to toggle between the Fahrenheit and
Celsius readings. After approximately four seconds
of inactivity, the display will stop blinking and
display the last selection made.