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

Heated Seat Module and Seat Switch


Object Number: 801190  Size: LF
(1)Heated Seat Module - Driver (KA1) (Front Passenger Similar)
(2)Heated Seat Module Connectors
(3)Driver Seat
(4)Seat Adjuster Switch - Driver (Front Passenger Similar)
Figure 2:

Heated Seat Components


Object Number: 1347699  Size: LF
(1)Heated Seat Element - Front Passenger Seat Back (Driver Similar)
(2)Heated Seat Element - Front Passenger Seat Cushion Front and Rear and Heated Seat Thermistor - Front Passenger (Under Seat Cover) (Driver Similar)
(3)Seat Cover, Partially Removed