Mirrors; Manual Rearview Mirror; Automatic Dimming Rearview Mirror With Onstar , Compass And Temperature Display - GMC 2007 Sierra 1500 Pickup Owner's Manual

CAUTION:
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Four-wheel drive vehicles with the transfer
case in NEUTRAL will allow the vehicle to
roll, even if your automatic transmission
shift lever is in PARK (P). So, be sure the
transfer case is in a drive gear — not in
NEUTRAL. Always set your parking brake.
Follow the proper steps to be sure your vehicle
will not move. See Shifting Into Park (P)
(Automatic Transmission) on page 170.
If you are pulling a trailer, see Towing a Trailer on
page 429.

Mirrors

Manual Rearview Mirror

Pull or push the tab under the inside rearview
mirror to adjust it to the night or daytime setting. In
the nighttime setting, the glare from headlamps
behind the vehicle will be less intense.
176
Automatic Dimming Rearview Mirror
®
with OnStar , Compass and
Temperature Display
Your vehicle may have this feature. When on, an
automatic dimming 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.