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

Left Frame Rail, Rear of First Crossmember


Object Number: 690286  Size: MF
(1)Electronic Brake Control Module (EBCM)
(2)EBCM C2
(3)EBCM C1
Figure 2:

Wheel Speed Sensor (WSS) -- Front


Object Number: 690291  Size: MF
(1)Wheel Speed Sensor (WSS) -- RF
Figure 3:

Instrument Panel Harness to IP Mounted Components, Right Front View


Object Number: 689502  Size: MF
(1)Power Brake (P/B) Booster Pump Motor Relay
(2)Park Brake Pump Motor Relay
(3)Trailer Stop Lamp Relay
(4)Transmission Control Relay - MTW/MX4/Ignition Relay -- Engine Controls - L18
(5)ABS Relay Center
(6)Fuse Block 2 -- Underhood
(7)Fuse Block 1 -- Underhood
(8)C123
(9)C121
(10)Windshield Washer Fluid Pump
(11)Windshield Washer Reservoir
Figure 4:

Wheel Speed Sensor (WSS) -- Rear


Object Number: 690293  Size: SF
(1)Wheel Speed Sensor (WSS) -- RR
Figure 5:

Rear of Frame, Right Rear View


Object Number: 231761  Size: MF
(1)Wheel Speed Sensor (WSS) -- LR (RF Symilar)