GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Driver Seat


Object Number: 1405602  Size: MF
(1)Heated Seat Element - Driver Cushion (KA1)
(2)Seat Belt Switch - Left
(3)Heated Seat Element - Driver Back (KA1)
(4)Seat Adjuster Switch - Driver (AG1/ASN)
(5)Heated Seat Switch - Driver (KA1)
Figure 2:

Passenger Seat


Object Number: 1708026  Size: MF
(1)Heated Seat Element - Passenger Back (KA1)
(2)Heated Seat Element - Passenger Cushion (KA1)
(3)Heated Seat Switch - Passenger (KA1)
(4)Seat Belt Switch - Right