Sunroof Module
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The sunroof module consists of an internal motor and the necessary logic needed to accept commands from the sunroof switch. The sunroof module supplies voltage to the sunroof switch and monitors this voltage. When the sunroof switch is activated the switch signal circuit is pulled low and the motor will move the sunroof glass in the corresponding direction.