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

Power, Ground, and Seat Controls


Object Number: 1570555  Size: FS
Master Electrical Component List
Power Seats System Description and Operation
Control Module References
Heated Seat Controls
ABS, AUX HTR PMP, ESCM, HCM-B, MBEC1, RTD, STUD 1, STUD 2, TRANS PUMP, and VSES/ECAS Fuses and RT DOOR and SEAT Circuit Breakers
ABS, AUX HTR PMP, ESCM, HCM-B, MBEC1, RTD, STUD 1, STUD 2, TRANS PUMP, and VSES/ECAS Fuses and RT DOOR and SEAT Circuit Breakers
G304, G305, G306, and G390
Figure 2:

Heated Seat Controls


Object Number: 1570559  Size: FS
Master Electrical Component List
Heated Seats Description and Operation
Control Module References
Power, Ground, and Seat Controls
Power, Ground, DLC, and Splice Pack SP205
Seat Motors and Position Sensors