GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: Refer to Brake Fluid Irritant Caution in the Preface section.

Caution: For safety reasons, the Brake Pressure Modulator Valve (BPMV) must not be repaired; the complete unit must be replaced. With the exception of the EBCM/EBTCM, no screws may be loosened. If screws are loosened, it will not be possible to get the brake circuits leak-tight and personal injury may result.

Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in the Preface section.


    Object Number: 230405  Size: SH
  1. Turn the ignition switch to the OFF position.
  2. Remove the cruise control module mounting bolts, if equipped.
  3. Position the cruise control module aside.
  4. Remove the air cleaner assembly from the engine compartment. Refer to Air Cleaner Assembly Replacement .
  5. Disconnect the electronic brake control module (EBCM) harness electrical connector (1).
  6. Disconnect the EBCM to brake pressure modulator valve (BPMV) electrical connector.

  7. Object Number: 777629  Size: SH

    Important: Note the locations of the brake pipes in order to aid in installation.

  8. Disconnect the 4 wheel brake pipes from the BPMV.
  9. Important: Cap the brake pipes to prevent brake fluid leakage and contamination.

  10. Position the brake pipes aside.

  11. Object Number: 777628  Size: SH
  12. Disconnect the master cylinder brake pipes from the BPMV.
  13. Loosen the brake pipes, but do not remove the brake pipes from the master cylinder.
  14. Important: Cap the brake pipes to prevent brake fluid leakage and contamination.

  15. Position the brake pipes aside.

  16. Object Number: 648180  Size: SH
  17. Remove the 2 lower BPMV mounting bracket nuts (2) from the inner wheel housing mount surface of the strut tower.
  18. Loosen the top BPMV mounting nut.
  19. Remove the BPMV mounting bracket and the EBCM assembly from the vehicle by sliding up and toward the engine to separate from the wheelhouse slot.

  20. Object Number: 777630  Size: SH

    Notice: When removing the brake pressure modulator valve, protect the vehicle exterior from possible brake fluid spillage. Brake fluid can cause damage to painted surfaces.

  21. Remove the 2 nuts (1) that secure the BPMV to the mounting bracket (2).
  22. If only replacing the BPMV, remove the EBCM. Refer to Electronic Brake Control Module Replacement .

Installation Procedure


    Object Number: 777630  Size: SH
  1. Install EBCM to the BPMV (1, if removed. Refer to Electronic Brake Control Module Replacement .
  2. Install BPMV/EBCM assembly to the mounting bracket.
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the 2 nuts (1) securing the BPMV assembly to the mounting bracket (2).
  5. Tighten
    Tighten to 10 N·m (84 lb in).


    Object Number: 648180  Size: SH
  6. Install the BPMV bracket to the strut tower.
  7. Install the 3 BPMV mounting nuts (2).
  8. Tighten

        • Tighten to 10 N·m (89 lb in).
        • Reposition any lines or hoses that were moved out of place.

    Object Number: 777628  Size: SH

    Caution: Make sure brake pipes are correctly connected to brake pressure modulator valve. If brake pipes are switched by mistake, wheel lockup will occur and personal injury may result. The only two ways this condition can be detected are by using a Scan Tool or by doing an Antilock stop.

    Important: If a new BPMV is being installed, remove the shipping plugs from the valve openings as necessary.

  9. Install the master cylinder brake pipes into the BPMV.
  10. Tighten
    Tighten the fittings to 24 N·m (18 lb ft).


    Object Number: 777629  Size: SH
  11. Install the 4 wheel brake pipes on the BPMV.
  12. Tighten
    Tighten the fittings to 25 N·m (18 lb ft).

  13. Connect the EBCM to BPMV electrical connector.

  14. Object Number: 230405  Size: SH
  15. Connect the EBCM harness electrical connector (1).
  16. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  17. Install the cruise control module, if equipped.
  18. Perform the automated ABS bleed procedure. Refer to Antilock Brake System Automated Bleed Procedure .