GMC 2010 GMC Yukon/Yukon XL, Owner'S Manual

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The sunroof has a comfort stop feature which stops the
sunroof from opening to the full-open position. From the
comfort stop position, press the rear of the driver's side
switch a second time to open the sunroof to the
full-open position.
When the sunroof is opened, an air deflector will
automatically raise. The air deflector will retract when
the sunroof is closed.
Vent: The sunroof has an express-vent open feature.
From the closed position, press the rear of the
passenger's side switch to vent the sunroof. To stop
the sunroof partway, press the switch a second time.
To close the sunroof, press and hold the front of the
passenger's side switch. To stop the sunroof partway,
release the switch.
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 from closing
at the point of the obstruction. The sunroof will then
open halfway, and the air deflector will raise. To close
the sunroof once it has re-opened, refer to the
“ Express-Close ” or “ Manual-Close ” functions described
previously. If the sunroof is in the vent position, and
there is an object in the path of the sunroof when it
closing, the anti-pinch feature will detect the object
and stop the sunroof. To close the sunroof once
it has re-opened, refer to the
“ Manual-Close ” or
“ Express-Close ” functions described previously.
Dirt and debris may collect on the sunroof seal or in the
tracks that could cause an issue with sunroof operation,
noise or 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 sunroof.
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