GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2009 🢒 XLR 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Brake Pressure Modulator Valve Replacement

Removal Procedure

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

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  3. Drain the cooling system. Refer to Cooling System Draining and Filling.
  4. Remove the intake manifold sight shield or the fuel injector sight shield. Refer to Intake Manifold Sight Shield Replacement (LC3) or Fuel Injector Sight Shield Replacement (LH2).
  5. If equipped with RPO LH2, remove the air cleaner inlet duct. Refer to Air Cleaner Inlet Duct Replacement.
  6. Disconnect the upper radiator hose. Refer to Radiator Inlet Hose Replacement.

    7. Position the hose aside.

  7. Disconnect the radiator surge tank inlet hose. Refer to Radiator Surge Tank Inlet Hose/Pipe Replacement.

    8. Position the hose aside.

  8. Remove the drive belt tensioner. Refer to Supercharger Belt Tensioner Replacement (LC3) or Drive Belt Tensioner Replacement (LH2).
  9. Clean the area surrounding the electronic brake control module (EBCM) and the brake pressure modulator valve (BPMV) of and dirt and debris.
  10. Disconnect the EBCM electrical connector.

    11. Object Number: 2141647 Size: SH
  11. Disconnect the left rear brake pipe fitting (1).

    12. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid leaks and contamination.

  12. Disconnect the right rear brake pipe fitting (2).

    13. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid leaks and contamination.


    Object Number: 2141648 Size: SH
  13. Disconnect the right front brake pipe fitting (1).

    14. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid leaks and contamination.

    Do not force the components apart.

  14. Disconnect the left front brake pipe fitting (2).

    15. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid leaks and contamination.


    Object Number: 2141653 Size: SH
  15. Disconnect the master cylinder secondary brake pipe fitting (1).

    16. Cap the brake pipe fitting and plug the BPMV inlet port to prevent brake fluid leaks and contamination.

  16. Disconnect the master cylinder primary brake pipe fitting (2).

    17. Cap the brake pipe fitting and plug the BPMV inlet port to prevent brake fluid leaks and contamination.


    Object Number: 2141655 Size: SH
  17. Remove the BPMV nuts (1).

    18. Object Number: 2141659 Size: SH
  18. Remove the EBCM/BPMV module assembly (1) from the bracket.

    19. Object Number: 2141669 Size: SH
  19. Remove the BPMV insulators (1).

    20. Inspect the insulators for damage and replace, if necessary.


    Object Number: 2141671 Size: SH
  20. Remove the EBCM bolts (1).

    21. Object Number: 2141673 Size: SH

    Note: Do not attempt to pry or lever the EBCM from the BPMV.

  21. Carefully remove the EBCM (1) from the BPMV.

    22. Do not force the components apart.

  22. Clean the mating surfaces of the EBCM and the BPMV with denatured alcohol and allow to dry.

Installation Procedure

    Object Number: 2141673 Size: SH
  1. Carefully install the EBCM (1) to the BPMV.

    2. Do not force the components together.

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 2141671 Size: SH
  2. Install the EBCM bolts (1) and tighten to  3 N·m (27 lb in).

    3. Object Number: 2141669 Size: SH
  3. Install the BPMV insulators (1).

    4. Object Number: 2141655 Size: SH
  4. Install the EBCM/BPMV module assembly to the bracket.
  5. Install the BPMV nuts (1) and tighten to  12 N·m (106 lb in).

    6. Object Number: 2141653 Size: SH
  6. Connect the master cylinder secondary brake pipe fitting (1) and tighten to  18 N·m (13 lb ft).
  7. Connect the master cylinder primary brake pipe fitting (2) and tighten to  18 N·m (13 lb ft).

    8. Object Number: 2141648 Size: SH
  8. Connect the right front brake pipe fitting (1) and tighten to  18 N·m (13 lb ft).
  9. Connect the left front brake pipe fitting (2) and tighten to  18 N·m (13 lb ft).

    10. Object Number: 2141647 Size: SH
  10. Connect the left rear brake pipe fitting (1) and tighten to  18 N·m (13 lb ft).
  11. Connect the right rear brake pipe fitting (2) and tighten to  18 N·m (13 lb ft).
  12. Install the drive belt tensioner. Refer to Supercharger Belt Tensioner Replacement (LC3) or Drive Belt Tensioner Replacement (LH2).
  13. Install the intake manifold sight shield or the fuel injector sight shield. Refer to Intake Manifold Sight Shield Replacement (LC3) or Fuel Injector Sight Shield Replacement (LH2).
  14. Connect the radiator surge tank inlet hose. Refer to Radiator Surge Tank Inlet Hose/Pipe Replacement.
  15. If equipped with RPO LH2, install the air cleaner inlet duct. Refer to Air Cleaner Inlet Duct Replacement.
  16. Connect the upper radiator hose. Refer to Radiator Inlet Hose Replacement.
  17. Fill the cooling system. Refer to Cooling System Draining and Filling.
  18. Connect the EBCM electrical connector.
  19. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  20. If installing a new EBCM, program the EBCM. Refer to Service Programming System (SPS).
  21. Perform the Antilock Brake System Automated Bleed Procedure.