GMC Terrain 2018 Owner's Manual page 54

Sunroof Switch
Express-Open/Express-Close : To
express-open the sunroof, fully
press and release (1). Press
the switch again to stop it. To
express-close the sunroof, fully
press and release (1). Press
the switch again to stop it.
Open/Close (Manual Mode) : To
open the sunroof, press and hold
(1) until the sunroof reaches
the desired position. Press and hold
(1) to close it.
Comfort Stop : The sunroof has a
comfort stop feature that stops the
sunroof from opening fully. Press
and release the rear of
the sunroof to the comfort open
position. Pressing the rear of
again will open the sunroof fully.
If the sunshade is not fully open
when the comfort stop feature is
pressed the second time, the
sunshade will open fully.
Vent : From the closed position,
press (1) to vent the sunroof.
Sunshade Switch
Express-open/Express-close : To
express-open the sunshade, fully
press and release
express-close the sunshade, fully
press and release
the switch again to stop it.
Open/Close : To open the
sunshade, press and hold
until the sunshade 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.
Automatic Reversal System
to open
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 again.
Keys, Doors, and Windows
If frost or other conditions prevent
closing, override the feature by
closing the sunroof in manual
mode. To stop movement, release
(2). To
the switch.
(2) . Press
(2)
Dirt and debris may collect on the
sunroof seal or in the track. This
could cause issues with sunroof
operation and 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.
If water is seen dripping into the
water drainage system, this is
normal.
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