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

Behind the LH Seat


Object Number: 296286  Size: LF
(1)LH Adaptive Lumbar Module (RH similar)
Figure 2:

Passenger Compartment, in the Center Console


Object Number: 562346  Size: LF
(1)LH Front Heated Seat Switch
(2)RH Front Heated Seat Switch
(3)Console Trim Plate
(4)Traction Control Switch
Figure 3:

Passenger Compartment, Inside the Front Seat Back


Object Number: 422507  Size: LF
(1)Driver Lumbar Horizontal Motor
Figure 4:

Passenger Compartment, Inside the Front Seat Back


Object Number: 422424  Size: LF
(1)Driver Lumbar Vertical Motor
Figure 5:

Passenger Compartment, on the Side of the Seat


Object Number: 422400  Size: LF
(1)RH Lumbar Switch (LH Similar)
(2)RH Seat Switch (LH Similar)
Figure 6:

Passenger Compartment, Under the Driver Seat


Object Number: 154455  Size: LF
(1)C300 ( C307 RH Similar)
(2)S303
(3)S302
(4)Driver Inflatable Restraint Side Impact Inflator Module (Passenger Similar)
Figure 7:

Rear Heated Seat Modules


Object Number: 297485  Size: LF
(1)LH Rear Heated Seat Module
(2)RH Rear Heated Seat Module