GMC Sierra 2500 HD2022 Owner's Manual page 46

Slide Switch
Express-Open/Express-Close : To
express-open the sunroof, fully press and
release (1). Press and release
to stop the movement. To express-close the
sunroof, fully press and release
Press and release (1) again to stop the
movement.
Sunroof Comfort Stop Position : This vehicle
may be equipped with a comfort stop to
prevent excessive wind noise. The sunroof
will stop approximately halfway open during
an express open. To fully open the sunroof,
press and release (1) again.
Open/Close (Manual Mode) : To open the
sunroof, press and hold (1). Release
to stop the movement. Press and hold
(1) to close the sunroof. Release
stop the movement.
Tilt Switch
Vent : From the closed position, press
to vent the sunroof. Press
the vent.
When the sunroof is opened, an air deflector
will automatically raise. The air deflector will
retract when the sunroof is closed.
The sunroof also has a sunshade, which can
be pulled forward to block sun rays. The
sunshade must be opened and closed
manually.
(1) again
Automatic Reversal System
(1).
The sunroof has an automatic reversal
system that is only active when the sunroof
is operated in express-close mode.
If an object is in the path while
express-closing, the reversal system will
detect an object, stop, and open the sunroof
slightly.
If frost or other conditions prevent closing,
override the feature by closing the sunroof
in manual mode. To stop movement, release
(1).
(1)
(1) to
(2)
(2) to close
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 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 tracks.
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