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

Left Rear of Engine Compartment


Object Number: 1760315  Size: LF
(1)Brake Fluid Level Switch
(2)Electronic Brake Control Module (EBCM)
(3)Hill Hold Valve (LAT)
(4)Brake Pressure Sensor (LAT)
(5)Brake Vacuum Sensor (LAT)
Figure 2:

Front Wheel Speed Sensors and Park Brake Switch


Object Number: 1781862  Size: LF
(1)Wheel Speed Sensor (WSS)-RF Connector
(2)WSS-RF
(3)Park Brake Switch
(4)WSS-LF Connector
(5)WSS-LF