GMC 2012 Sierra - Manual (Page 66)

Black plate (22,1) GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
2-22 Keys, Doors, and Windows
Roof
Sunroof (Extended Cab)
On vehicles with a sunroof, the
sunroof only operates when the
ignition is in the ACC/ACCESSORY
or ON/RUN or the Retained
Accessory Power (RAP) is active.
See Retained Accessory Power
(RAP) on page 9‑29 for more
information.
Vent: From the closed position,
press and hold the rear of the switch
to vent the sunroof. To close the
sunroof, press and hold the front of
the switch.
Open: From the vent position,
the sunroof can be fully opened
either manually or by using the
express-open feature. To open
manually, press the rear of the
switch to the first detent and hold
until the sunroof has reached the
desired position. To open using
express-open, press the rear of the
switch to the second detent and
release. The sunroof will move to
the full open position. To stop the
sunroof partway, press the switch a
second time.
Close: From the vent, or open
position, press and hold the front of
the switch to close the sunroof.
The sunroof also has a roller
sunshade that can be used to
block the rays of the sun. The
roller sunshade can be manually
operated with the sunroof in an
open or closed position. To open the
sunshade, press and unlatch it, and
roll it back. To close, pull it forward
and latch it into the closed position.
When the sunroof is opened, an air
deflector will automatically raise.
The air deflector will retract when
the sunroof is closed.
Dirt and debris may collect on the
sunroof seal or in the track. This
could cause an issue with sunroof
operation or noise. It could also
plug the water drainage system.
Periodically open the sunroof and
remove any obstacles or loose
debris. Wipe the sunroof seal and
roof sealing area using a clean
cloth, mild soap, and water. Do not
remove grease from the sunroof.