GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Corvette 🢒 Brakes 🢒 Antilock Brake System 🢒 Brake Pressure Modulator Valve Replacement

Removal Procedure

    Object Number: 705577 Size: SH
  1. Turn the ignition switch to the OFF position.
  2. Disconnect the EBCM harness connector.
  3. Remove the BPMV pump motor ground wire.
  4. Remove the brake pipes from the master cylinder to the BPMV (1, 2), noting the location.

    5. Object Number: 705580 Size: SH
  5. Remove the brake pipes from the BPMV (1, 2) to the front brake calipers, noting the location.

    6. Object Number: 705585 Size: SH
  6. Remove the brake pipes from the BPMV (1, 2) to the rear brake calipers, noting the location.

    7. Object Number: 705573 Size: SH
  7. Disconnect the electrical connector from the brake fluid pressure sensor (2).
  8. Remove the two insulator nuts (1).
  9. Remove the EBCM/BPMV from the vehicle as one unit.

    10. Object Number: 143452 Size: SH
  10. Remove the insulator mounting bolt from the EBCM.
  11. Remove the four EBCM to BPMV bolts.
  12. Separate the EBCM from the BPMV by gently pulling apart until separated.
  13. Carefully remove the seal.

    14. The seal may be reused if it is not cut or damaged.

Installation Procedure

    Important: When installing a new BPMV, do NOT remove the shipping plugs from the outlets until after installation into the vehicle.


    Object Number: 143452 Size: SH
  1. Clean the BPMV seal surface with alcohol using a clean rag.
  2. Install the seal to the BPMV, if it is not cut or damaged.

    3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the EBCM to the BPMV.
  4. Tighten the mounting bolts in the following sequence:

    5. Tighten

        • First pass to 3 N·m (27 lb in).
        • Second pass to 6 N·m (53 lb in).
  5. Install the EBCM/BPMV insulator mounting bolt.

    6. Tighten
    Tighten the bolt to 14 N·m (10 lb ft).


    Object Number: 707000 Size: SH
  6. Install the EBCM/BPMV into the bracket on the vehicle.
  7. Install the two insulator nuts (1).

    8. Tighten
    Tighten the to 12 N·m (106 lb in).

  8. Connect the brake fluid pressure sensor electrical connector (2).

    9. Object Number: 705585 Size: SH
  9. Install the brake pipes from the rear brake calipers (1, 2) to the BPMV in the same location as removed.

    10. Tighten
    Tighten the brake pipe fittings to 16 N·m (12 lb ft).


    Object Number: 705580 Size: SH
  10. Install the brake pipes from the front brake calipers (1, 2) to the BPMV in the same location as removed.

    11. Tighten
    Tighten the brake pipe fittings to 16 N·m (12 lb ft).


    Object Number: 705577 Size: SH
  11. Install the brake pipes from the master cylinder (1, 2) to the BPMV in the same location as removed.

    12. Tighten
    Tighten the brake pipe fittings to 16 N·m (12 lb ft).

  12. Connect the BPMV pump motor ground.
  13. Connect the EBCM harness connector.

    14. Important: Both sides of the EBCM harness connector must be engaged with lever before closing.

  14. Turn the ignition switch to the ON position; do NOT start the engine.
  15. Fill and bleed the hydraulic brake system. Refer to Master Cylinder Reservoir Filling and Hydraulic Brake System Bleeding in Hydraulic Brakes.
  16. Perform the Automated Bleed Procedure. Refer to Antilock Brake System Automated Bleed Procedure .
  17. Perform the Diagnostic System Check - ABS .