Chevrolet 2007 Avalanche Owner's Manual page 149

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.
Press and release the TEMP button to toggle the
temperature display between Fahrenheit or
Celsius.
If an abnormal reading is displayed, please
consult your GM dealer.
Automatic Dimming Mirror Operation
Press and hold the TEMP button for approximately
eight seconds to turn the automatic dimming
feature on or off. The indicator light to the left of
the TEMP button will turn on or off to indicate
when the feature is on. Once the mirror is turned
off, it will remain off until it is turned back on,
or until the vehicle is restarted.
Compass Operation
Press the COMP button once briefly to turn the
compass on or off.
When the ignition is started and the compass
feature is on, the compass will show two character
boxes for approximately two seconds. After
two seconds, the mirror will display the compass
heading.
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