GM Service Manual Online
For 1990-2009 cars only

The power sunroof is electronically operated from a switch. The switch is located in the overhead console. When you press the switch rearward, the glass slides rearward into the storage space between the roof and the headliner.

Pressing the switch forward cause the glass panel to move to the closed position. If the switch is pressed forward again while the glass is in the closed position, the rear edge of the glass will raise to the vent position. In order to close the glass from the vent position, push the switch rearward. Press the switch for each separate position.