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

6-Way LH Power Seat


Object Number: 670113  Size: FS
Master Electrical Component List
Power Seats System Description and Operation
6-Way RH Power Seat
Ign ACC, RUN and RAP Bus Bar
Power Seats, Power Windows Circuit Breakers and RAP Relay
Lumbar w/o Memory Seats
S313 and S419
G420,G450 and S427 (Utility w/ Endgate and Crew Cab)
Figure 2:

6-Way RH Power Seat


Object Number: 670115  Size: FS
Master Electrical Component List
Power Seats System Description and Operation
8-Way LH Power Seat
6-Way LH Power Seat
Ign ACC, RUN and RAP Bus Bar
Power Seats, Power Windows Circuit Breakers and RAP Relay
S320 and S420
G420,G450 and S427 (Utility w/ Endgate and Crew Cab)
Figure 3:

8-Way LH Power Seat


Object Number: 670116  Size: FS
Master Electrical Component List
Power Seats System Description and Operation
8-Way RH Power Seat
6-Way RH Power Seat
Ign ACC, RUN and RAP Bus Bar
Power Seats, Power Windows Circuit Breakers and RAP Relay
Lumbar w/o Memory Seats
G420,G450 and S427 (Utility w/ Endgate and Crew Cab)
S313 and S419
Figure 4:

8-Way RH Power Seat


Object Number: 670118  Size: FS
Master Electrical Component List
Power Seats System Description and Operation
8-Way LH Power Seat
Ign ACC, RUN and RAP Bus Bar
Power Seats, Power Windows Circuit Breakers and RAP Relay
S320 and S420
G420,G450 and S427 (Utility w/ Endgate and Crew Cab)