GMC 2000 Sierra 1500 Pickup Owner's Manual page 136

Temperature Display
The temperature can be displayed by pressing the TEMP
side of the switch. Pressing the TEMP switch 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
three seconds until the display blinks F _ and C _ .
Press and release the TEMP switch to toggle between
the Fahrenheit and Celsius readings. After five seconds
of inactivity, the display will return to a normal
temperature reading.
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Press and release the TEMP switch to toggle the
temperature display between Fahrenheit or Celsius. If an
abnormal reading is displayed, please consult your dealer.
Electrochromic Mirror Operation
The right side of the switch, labeled TEMP and located
at the bottom of the mirror, turns the electrochromic
mirror on and off. An indicator light, located to the
right of the TEMP switch, 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.
Compass Operation
Press the COMP switch once briefly to turn the compass
on or off.
When the ignition and the compass feature are on, the
compass will show two character boxes for
approximately two seconds. After two seconds, 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.
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