Power and Grounds
WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
Battery positive voltage is supplied at all times to the sunroof control module assembly from the 25 A SUNROOF fuse located in the rear fuse block. Ground is supplied to the sunroof control module through the module ground circuit and G403.
Ground is supplied to the sunroof switch through the ground circuit and the sunroof control module.