Closing to the Fully Closed Position

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

To close the power sunroof from the following positions:

Open position, press and hold the sunroof switch forward.
Vent position, press and hold the sunroof vent switch forward.

Holding the sunroof switch to the closed position will apply the sunroof switch low reference circuit to either the sunroof switch close signal or the sunroof switch close vent signal circuit. Holding the sunroof switch to the closed position will cause the sunroof switch close signal or the sunroof switch close vent signal circuit (12 volt reference) to be pulled to 0 volts. The constant low input to the sunroof control module indicates a close request. As the close request has been initiated, the sunroof motor/module assembly will drive the motor to the closed position. As the sunroof glass nears the closed position, the wind deflector will retract, and the rear sunroof glass will raise slightly, then seats to flush with the roof panel. To close the sunshade, this will have to be manually slid closed.