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

Heated Seat Control Module and Lumbar Switch (W/ Heat) -- Front Passenger


Object Number: 680746  Size: FS
Master Electrical Component List
Heated Seats Description and Operation
Heated Seat Control Module and Lumbar Switch (W/ Heat) - Driver
HVAC, RR W/W, ATC, HTD SEAT, RR DEFOG and HTD MIR Fuses
B+ Bus Bar
Ign RUN and START Bus Bar
RDO IGN, FRT WPR, RR WIPER, ABS and CRUISE Fuses
S313 and S419
G450
Figure 2:

Heated Seat Control Module and Lumbar Switch (W/ Heat) -- Driver


Object Number: 680749  Size: FS
Master Electrical Component List
Heated Seats Description and Operation
Heated Seat Control Module and Lumbar Switch (W/ Heat) - Front Passenger
HVAC, RR W/W, ATC, HTD SEAT, RR DEFOG and HTD MIR Fuses
B+ Bus Bar
Ign RUN and START Bus Bar
RDO IGN, FRT WPR, RR WIPER, ABS and CRUISE Fuses
S313 and S419
G450