GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Notice: To prevent equipment damage, never connect or disconnect the wiring harness connection from the EBCM with the ignition switch in the ON position.


    Object Number: 393786  Size: SH
  1. Turn the ignition switch to the OFF position.
  2. Remove the air cleaner housing from the engine compartment. Refer to Air Cleaner Assembly Replacement in Engine Controls.
  3. Remove red locking tab from connector lock tab (1).
  4. Push down lock tab (1) and then move sliding connector cover (2) to the open position.
  5. Disconnect the EBCM harness connector.
  6. Brush off any dirt/debris that has accumulated on the assembly.

  7. Object Number: 648179  Size: SH
  8. Remove the master cylinder mount nuts (1).
  9. Remove the master cylinder and place the master cylinder off to the side, do not disconnect the master cylinder brake pipes.

  10. Object Number: 459499  Size: SH
  11. Remove the four EBCM to BPMV screws.
  12. Important: Do not pry apart using a tool. Be careful not to damage BPMV surface. Care must be taken not to damage the solenoid valves when the EBCM is removed from the BPMV.

  13. Separate the EBCM from the BPMV by gently pulling apart until separated.

Installation Procedure


    Object Number: 459499  Size: SH
  1. Clean the BPMV surface with alcohol using a clean rag.
  2. Install the EBCM to the BPMV.
  3. Install the four screws that attaches the EBCM to BPMV.
  4. Tighten
    Tighten the four screws to 5 N·m (44 lb in).


    Object Number: 648179  Size: SH
  5. Install the master cylinder to the brake booster.
  6. Install the master cylinder mount nuts (1).
  7. Tighten
    Tighten the two mount nuts to 25 N·m (18 lb ft).


    Object Number: 393786  Size: SH
  8. Connect the EBCM harness connector.
  9. Push down lock tab (1) and then move sliding connector cover (2) back in the home position to lock.
  10. Insert red locking tab back in place.
  11. Install the air cleaner housing. Refer to Air Cleaner Assembly Replacement in Engine Controls.
  12. Turn the ignition switch to the RUN position, do not start engine.
  13. Perform the Diagnostic System Check - ABS .