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.
Fig 1: Driver Heated and Cooled Seat (KB6)
Courtesy of GENERAL MOTORS CORP.
Fig 2: Driver Heated and Cooled Seat Switch (KA1 KB6)
Courtesy of GENERAL MOTORS CORP.
Fig 3: Passenger Heated and Cooled Seat (KB6)
Courtesy of GENERAL MOTORS CORP.
Fig 4: Passenger Heated and Cooled Seat Switch (KA1 KB6)