GM Service Manual Online
For 1990-2009 cars only

The power sunroof is electronically operated from the power sunroof switch.

The switches are located in the overhead console. When you press the sunroof switch to the first detent rearward, the glass panel slides rearward until the switch is released. Pressing the sunroof switch to the second detent rearward causes the glass panel to slide to the comfort stop position, pressing the switch again causes the glass to slide fully rearward into the storage space between the roof and the headliner. Pressing the sunroof switch forward causes the glass panel to move to the closed position.

When you press the vent switch rearward 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, press the vent switch forward.