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

Memory/Heated Seat Switch


Object Number: 1860634  Size: LF
(1)Outside Rearview Mirror (OSRVM) - Driver
(2)Memory/Heated Seat Switch (AN3)
Figure 2:

Passenger Heated Seat Switch


Object Number: 1860625  Size: LF
(1)Heated Seat Switch - Passenger (AN3)
(2)Outside Rearview Mirror (OSRVM) - Passenger
(3)Door Trim
Figure 3:

Seat Heating Elements - Driver (AN3)


Object Number: 1859595  Size: LF
(1)Heated Seat Element - Driver Back
(2)Heated Seat Element - Driver Cushion
Figure 4:

Seat Heating Elements - Passenger (AN3)


Object Number: 1859596  Size: LF
(1)Heated Seat Element - Passenger Back
(2)Heated Seat Element - Passenger Cushion