Power and Grounds
WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
Battery positive voltage is supplied to the rear heated seat module from the RR HTD/SEAT (DTS) fuse that is located in the rear fuse block. This voltage is used to power up the heated seat module and to supply power to the seat heater elements. The rear heated seat module is grounded through the module ground circuit and G301.