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

Left Seat Pump


Object Number: 690929  Size: FS
Master Electrical Component List
Lumbar Support Description and Operation
RH Seat Pump
Power, Ground, DLC and LH Seat Adjuster Switch
LH Seat Relay Center
Instrument Panel Electrical Center Bussing (1 of 2)
G205
Figure 2:

Right Seat Pump


Object Number: 690933  Size: FS
Master Electrical Component List
Lumbar Support Description and Operation
LH Seat Pump
Instrument Panel Electrical Center Bussing (1 of 2)
RH Seat Relay Center
RH Seat Relay Center
G301, G402 and G302