GMC 1999 Suburban, Owner'S Manual, Page: 117 / 424

yellow blue
2-47
Electrochromic Inside Rearview Mirror
with Compass and Temperature Display
(If Equipped)
Your vehicle may have electrochromic inside and
outside rearview mirrors.
When on, an electrochromic mirror automatically dims
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. This can be used as a compass
or to indicate outside air temperature.
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.