Circuit/System Description
WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
Ignition voltage is applied to the sunroof switch via the S ROOF fuse. The sunroof switch provides voltage and ground to the sunroof motor when the switch is activated. The position of the sunroof switch determines which sunroof motor control circuits will receive voltage and which will receive ground.