Open to Vent
WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. 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, momentarily press the rear portion, OPEN/VENT side, of the sunroof switch. This will apply the sunroof switch low reference circuit to the sunroof open signal circuit, 5 volt reference input, pulling the reference voltage to 0 volts. Once the sunroof control module receives the input request, the sunroof control module will control the sunroof motor to slightly raise the rear of the sunroof glass upward. The sunroof glass will soft stop at the full vent position based on the inputs from the limit switches. The sunshade will have to be manually slid closed.