Outside Manual Mirrors - GMC Sierra 2008 Owner's Manual

Automatic Dimming Mirror Operation
O On/Off: Press this button to turn the automatic
dimming feature on or off. The indicator light to the left
of the button will turn on to indicate when the feature
is on. Once the mirror is turned off, it will remain off until
it is turned back on, or until the vehicle is restarted.
Compass Operation
Press the compass/temperature button once briefly
to turn the display on or off.
Compass Calibration
See "Compass Calibration" under Automatic Dimming
Rearview Mirror with OnStar
Temperature Display on page 2-53 for more information.
Compass Variance
See "Compass Variance" under Automatic Dimming
Rearview Mirror with OnStar
Temperature Display on page 2-53 for more information.
®
, Compass and
®
, Compass and
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.

Outside Manual Mirrors

Adjust the outside mirrors to see the side of the vehicle
and have a clear view of objects behind you.
Manually fold the mirrors inward to prevent damage
when going through an automatic car wash.
To fold, push the mirror toward the vehicle. Push
the mirror outward, to return to its original position.
Using hood-mounted air deflectors and add-on convex
mirror attachments could decrease mirror performance.
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