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GMC Sierra/Sierra Denali 2500 HD/3500 HD Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-14632286) - 2021 - CRC - 11/19/20
44
Keys, Doors, and Windows
Roof
Sunroof
1. SLIDE Switch
2. TILT Switch
If equipped, the sunroof operates when the
ignition is on or in ACC/ACCESSORY, or when
Retained Accessory Power (RAP) is active.
See
Retained Accessory Power (RAP)
Slide Switch
Express-Open/Express-Close :
To
express-open the sunroof, fully press and
release
I
(1). Press and release
I
(1) again
to stop the movement. To express-close the
sunroof, fully press and release
K
(1).
Press and release
K
(1) again to stop the
movement.
Open/Close (Manual Mode) :
To open the
sunroof, press and hold
I
(1). Release
I
(1)
to stop the movement. Press and hold
K
(1) to close the sunroof. Release
K
(1) to
stop the movement.
Tilt Switch
Vent :
From the closed position, press
J
(2)
to vent the sunroof. Press
K
(2) to close
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.
Automatic Reversal System
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
K
(1).