GMC 2011 Sierra Denali Owner's Manual page 53

Manual-Open/Manual-Close: To
open the sunroof, press the rear of
the driver side switch to the first
detent and hold until the sunroof
reaches the desired position.
To close the sunroof, press the front
of the driver side switch to the first
detent and hold until the sunroof
reaches the desired position.
When the sunroof is opened, an air
deflector will automatically raise.
The air deflector will retract when
the sunroof is closed.
Express-Open/Express-Close:
To express-open the sunroof, press
the rear of the driver side switch to
the second detent and release.
The sunroof will open automatically.
To stop the sunroof partway,
press the switch a second time.
To express-close the sunroof, press
the front of the driver side switch to
the second detent and release.
The sunroof will close automatically.
To stop the sunroof partway, press
the switch a second time.
The sunroof also has a sunshade
which can be pulled forward to block
sun rays. The sunshade must be
opened and closed manually.
Anti-Pinch Feature: If an object is
in the path of the sunroof while it is
closing, the anti-pinch feature will
detect the object and stop the
sunroof.
Keys, Doors and Windows
Dirt and debris may collect on the
sunroof seal or in the track. This
could cause an issue with sunroof
operation, noise, or plugging 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.
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