GMC Hummer H3 2008 Owner's Handbook Manual page 127

Instrumentation and Controls
Vent Position
When the glass panel is closed,
press and hold the front of the
switch to open the roof at the rear
to the vent position.
If you want to stop the roof in a
partially open position, release the
switch.
To close the vent, press and hold
the rear of the switch.
. . . 126
Sun Shade
The sun shade opens automatical-
ly when the sun roof is opened.
The sun shade will remain open
until you close it manually.
Slide the sun shade open or closed
using the handle.
The sun shade will not close past
the current position of the sun
roof.
Anti-Pinch Feature
If a head, hand or another object is
in the way of the sun roof as it is
closing, the glass panel will stop
and open to the pre-set comfort
position. Once the obstruction is
removed, the glass panel can be
closed.