Mirrors; Automatic Dimming Rearview Mirror With Onstar - GMC Sierra Denali Classic 2007 Owner's Manual

Mirrors

Automatic Dimming Rearview Mirror
®
with OnStar , Compass and
Temperature Display
Your vehicle may have this feature. When on, an
automatic dimming inside rearview mirror
automatically dims to the proper level to minimize
glare from lights behind you after dark.
The mirror also includes a dual 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.
(On/Off): This is the on/off button.
P
Temperature and Compass Display
Press the on/off button, located to the far
left, briefly to turn the compass/temperature
display on or off.
If the display reads CAL, you will need to calibrate
the compass. For more information on calibration,
see below.
To adjust between Fahrenheit and Celsius do the
following:
1. Press and hold the on/off button for
approximately four seconds until either a
flashing F or C appears.
2. Press the button again to change the display
to the desired unit of measurement. After
approximately four seconds of inactivity, the
new unit will be locked in and the
compass/temperature display will return.
If an abnormal temperature reading is displayed
for an extended period of time, please see
your dealer. Under certain circumstances, a delay
in updating the temperature is normal.
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