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

Left Front View of the Seat


Object Number: 321400  Size: LF
(1)Lumbar Vertical (Up/Down) Motor
(2)Lumbar Horizontal (In/Out) Motor
Figure 2:

Passenger Compartment, in the Center of the IP


Object Number: 599718  Size: LF
(1)Valet Switch
(2)IP Compartment Lamp
(3)Traction Control Switch
(4)Driver Information Center (DIC)
(5)RH Heated Seat Switch
(6)LH Heated Seat Switch
(7)Heater and A/C Programmer
(8)Radio
Figure 3:

Passenger Compartment, Left Front Seat


Object Number: 321402  Size: LF
(1)Seat Rear Vertical Motor (Hidden)
(2)Seat Recline Postion Sensor
(3)Seat Recline Motor
(4)S351 (Left), S356 (Right)
(5)S352 (Left), S357 (Right)
(6)C323 (Left) (Hidden)
(7)C305 (Left) C303 (Right)
(8)Seat Horizontal Postion Sensor
(9)Seat Rear Vertical Postion Sensor
(10)Memory Seat Module (MSM)
(11)Seat Horizontal Motor
(12)C320 (Left), C321 (Right) (Hidden)
(13)Seat Lumbar Vertical Relay
(14)Lumbar Switch
(15)Seat Switch
(16)Seat Front Vertical Motor
(17)Lumbar Horizontal Relay
(18)S349 (Left), S348 (Right)