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

Park Brake Components


Object Number: 258723  Size: LF
(1)Park Brake Pump Motor Relay
(2)Park Brake Pump Motor Connector
(3)Park Brake Pressure Valve Solenoid
(4)Park Brake Pressure Indicator Switch
(5)Park Brake Pressure Indicator Switch Connector/Wiring
(6)Park Brake Pump Motor Switch Connector/Wiring
(7)Park Brake Pump Motor
(8)Park Brake Actuator Position Switch Connector
(9)Park Brake Actuator Position Switch
(10)Park Brake Actuator
(11)Vehicle Speed Sensor (VSS) Connector
(12)Vehicle Speed Sensor (VSS)
(13)Park Brake Assembly
Figure 2:

Rear of Cowl and Steering Column Support


Object Number: 258722  Size: LF
(1)Park Brake Pull Button Switch
(2)Windshield Wiper Pulse Control Module
(3)Powertrain Control Module (PCM)
(4)PCM Connector C1
(5)PCM Connector C2
(6)Accelerator Pedal Position (APP) Sensor
(7)Stoplamp Switch
(8)IP Wiring Harness Junction Block
(9)Steering Column Connector
(10)Ignition Switch
(11)Transmission Range Shift Control