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

Center Console (RPO D55)


Object Number: 589880  Size: LF
(1)Drivers Heated Seat Switch
(2)Electronic Traction Control Switch
(3)Passengers Heated Seat Switch
(4)Ashtray Lamp Switch
(5)Ashtray Lamp
(6)Auxiliary Power Receptacle
(7)Cigar Lighter
(8)C240
Figure 2:

Power Seat (RPO KA1/AG6)


Object Number: 590911  Size: LF
(1)Seat Belt Switch
(2)Heated Seat Element (Cushion)
(3)Heated Seat Element (Back Cushion)
(4)Seat Ajuster Switch
(5)Lumbar Adjuster Switch
(6)Seat Back release Lever (Manual)
(7)C311
(8)Seat Rear Vertical Adjuster Actuator Motor
(9)Seat Horizontal Adjuster Actuator Motor
(10)Seat Front Vertical Adjuster Actuator Motor
(11)Seat Heater Control Module