Mirrors; Manual Rearview Mirror; Automatic Dimming Rearview Mirror - GMC Sierra Denali 2009 Owner's Manual

Mirrors

Manual Rearview Mirror

Hold the inside rearview mirror in the center to move it
for a clearer view behind your vehicle. Adjust the
mirror to avoid glare from the headlamps behind you.
Push the tab forward for daytime use and pull it for
nighttime use.

Automatic Dimming Rearview Mirror

The vehicle may have an automatic dimming rearview
mirror.
®
Vehicles with OnStar have three additional control
®
buttons for the OnStar
for more information about OnStar
subscribe to it. See OnStar
more information about the services OnStar
2-38
system. See your dealer/retailer
®
and how to
®
System on page 2-51 for
®
provides.
O (On/Off): Press to turn the dimming feature on or off.
The vehicle may also have a Rear Vision Camera
(RVC). See Rear Vision Camera (RVC) on page 2-45
for more information.
If the vehicle has RVC, the
turning the automatic dimming feature on or off will not
be available.
Automatic Dimming Mirror Operation
Automatic dimming reduces the glare from the
headlamps of the vehicle behind you. The dimming
feature comes on and the indicator light illuminates each
time the ignition is turned to start.
Cleaning the Mirror
Do not spray glass cleaner directly on the mirror. Use a
soft towel dampened with water.
O (On/Off) button for