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

Antilock Brake System Wiring


Object Number: 211884  Size: LF
(1)Wheel Speed Sensor (WSS) - RF
(2)Wheel Speed Sensor (WSS) - LF
Figure 2:

Undercarriage Wiring


Object Number: 598350  Size: LF
(1)Electronic Brake Control Module (EBCM)
(2)Electronic Brake Control Module (EBCM) Connector C2
(3)Electronic Brake Control Module (EBCM) Connector C1
(4)C314
(5)S126
(6)S127
(7)G302
(8)C310
(9)Evaporative Emission (EVAP) Canister Vent Solenoid