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Home >> Buick >> 2004 >> Century Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 107 (Sunroof System) >> Description and Operation >> Sunroof Description and Operation >> Open to Vent

Open to Vent

WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. 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, 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 raise the rear of the sunroof glass upward. The sunroof glass will soft stop at the full vent position based on the internal hall effect sensors. The sunshade will have to be manually slid closed.