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

Left Rear of Engine Compartment


Object Number: 1685114  Size: MF
(1)Brake Fluid Level Switch
(2)Electronic Brake Control Module (EBCM)
Figure 2:

Lower LF of the Passenger Compartment


Object Number: 1085605  Size: MF
(1)Park Brake Switch
(2)I/P Wiring Harness
(3)Park Brake Switch Connector
(4)Parking Brake