GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

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.


    Object Number: 393786  Size: SH
  1. Turn the ignition switch to the OFF position.
  2. Remove the attaching bolts for the cruise control module.
  3. Swing the cruise control module off to the side.
  4. Remove the air cleaner housing from the engine compartment. Refer to Air Cleaner Assembly Replacement in Engine Controls.
  5. Disengage the red locking tab from the connector (1).
  6. Push down lock tab (1) and then move sliding connector cover (2) to the open position.
  7. Disconnect the EBCM harness connector.

  8. Object Number: 559471  Size: SH

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

  9. Disconnect the four wheel brake pipes (1) from the BPMV (2).
  10. Swing the four wheel brake pipes out of the way only after covering the open pipes to avoid dripping or being contaminated.

  11. Object Number: 648181  Size: SH
  12. Disconnect the master cylinder brake pipes (1) from the BPMV (2).
  13. Loosen the brake pipes but do not remove the brake pipes from the master cylinder.
  14. Swing the two master cylinder brake pipes out of the way only after covering the open pipes to avoid dripping or being contaminated.

  15. Object Number: 648180  Size: SH
  16. Remove the three BPMV mounting bracket nuts (2) from the inner wheel housing mount suface of the strut tower.
  17. Reinstall the top nut upside down on the top stud.
  18. Lightly tap on the bottom of the nut until the stud has loosened up.
  19. Disconnect the ground strap between the EBCM assembly and the chasis.
  20. Remove the BPMV mounting bracket and EBCM assembly from the vehicle.

  21. Object Number: 559510  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.

  22. Remove the four bolts (3) that connect the BPMV (1) to the mounting bracket (2).
  23. Remove EBCM if replacing the BPMV only. Refer to Electronic Brake Control Module Replacement .

Installation Procedure


    Object Number: 559510  Size: SH
  1. Install EBCM onto the BPMV (1) if replacing the BPMV only. Refer to Electronic Brake Control Module Replacement .
  2. Install BPMV and EBCM as an assembly to the mounting bracket.
  3. Install the four bolts (3) that connects the BPMV assembly (1) to the mounting bracket (2).
  4. Tighten
    Tighten the four bolts (3) that connect the BPMV (1) to the mounting bracket (2) to 10 N·m (84 lb. in.).


    Object Number: 648180  Size: SH
  5. Install the BPMV bracket to the strut tower.
  6. Install the three nuts (2) that attach the BPMV mounting bracket to the strut tower.
  7. Tighten

        • Tighten the three BPMV mounting bracket nuts to 10 N·m (84 lb in).
        • Reposition any lines or hoses that were moved out of place.

    Object Number: 648181  Size: SH

    Important: If a new BPMV is being installed, remove the shipping plugs from the valve openings during the next few steps when ready .

    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.

  8. Install the master cylinder brake pipes (1) into the BPMV (2).
  9. Tighten
    Tighten the master cylinder brake pipe fittings to 24 N·m (18 lb ft).


    Object Number: 559471  Size: SH
  10. Install the four wheel brake pipes (1) on the BPMV (2).
  11. Tighten
    Tighten all four wheel brake pipe fittings to 24 N·m (18 lb ft).

  12. Reconnect the ground strap between the EBCM assembly and the chasis.

  13. Object Number: 393786  Size: SH
  14. Connect the EBCM harness connector.
  15. Push down lock tab (1) and then move sliding connector cover (2) back in home position to lock.
  16. Insert red locking tab back in place.
  17. Reinstall the air cleaner housing. Refer to Air Cleaner Assembly Replacement in Engine Controls.
  18. Reinstall the cruise control module.
  19. When all procedures have been completed, the automated ABS bleed procedure is required. Refer to Antilock Brake System Automated Bleed Procedure .