To Express Open to Vent

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

To open the power sunroof to the vent position from the closed position, turn the ignition to ON, with engine OFF. Momentarily press the sunroof switch rearward, this will apply the sunroof switch low reference to the sunroof switch open signal circuit (5 volt reference) input, pulling it to 0 volts. As long as the sunroof module only sees a single input request from the sunroof switch (open signal circuit), the module will automatically (express open) open the sunroof glass to the full vent position, raising the rear of the glass upward. The sunroof glass will stop (soft stop) at the full vent position based on the inputs from the limit switches. The sunshade will have to be manually slid open. To stop the sunroof glass in a desired vent position other than full vent, press the sunroof switch again to stop express to vent.