Chevrolet 2002 Tahoe Owner's Manual page 138

Temperature Display
Pressing the TEMP button once briefly will toggle the
compass/temperature reading on and off. To alternate
the temperature reading between Fahrenheit and Celsius,
press and hold the TEMP button for three seconds until
the display blinks _ F and _ C. Press and release the
TEMP button to toggle between the Fahrenheit and
Celsius readings. After five seconds of inactivity, the
display will stop flashing and stay at the last setting.
If an abnormal reading is displayed, please consult
your dealer.
2-52
Electrochromic Mirror Operation
The right side of the button, labeled TEMP, located at
the bottom of the mirror, turns the electrochromic mirror
on and off. An indicator light, located to the right of the
TEMP button, will come on when the electrochromic
mirror is turned on. To turn the mirror on, press and hold
the TEMP button for six seconds. To turn the mirror off,
press and hold the TEMP button for six seconds. The
indicator light will turn off, and remain off until it is
turned on, or until the vehicle is restarted.
Compass Operation
With the ignition on, the compass will show
two character boxes. The mirror will display the
compass heading.
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.