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

Center Rear of Floor Console


Object Number: 590107  Size: LF
(1)Electronic Traction Control Switch
Figure 2:

Right Rear Side of Engine Compartment


Object Number: 389013  Size: LF
(1)Electronic Brake Control Module (EBCM)/Brake Pressure Modulator (BPM)
(2)Electronic Brake Control Module (EBCM) Connector
(3)Brake Fluid Level Indicator Switch
Figure 3:

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 (Inline from Console to Body Harness)
Figure 4:

RF Wheel Speed Sensor


Object Number: 581251  Size: LF
(1)RF Wheel Speed Sensor
(2)C172 (Inline from Engine to RF Wheel Speed Sensor Harness)
Figure 5:

LF Wheel Speed Sensor


Object Number: 581253  Size: LF
(1)LF Wheel Speed Sensor
(2)C171 (Inline from Engine to LF Wheel Speed Sensor Harness)