GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2005 🢒 XLR 🢒 Preface 🢒 Cautions and Notices 🢒 Brake Pressure Modulator Valve Replacement

Removal Procedure
  1. Turn the ignition switch to the OFF position.
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  3. Drain the coolant system. Refer to Cooling System Draining and Filling in Engine Cooling.
  4. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 4.6L (LH2).
  5. Remove the air inlet duct. Refer to Air Cleaner Inlet Duct Replacement in Engine Controls - 4.6L (LH2).
  6. Disconnect the upper radiator hose. Refer to Radiator Inlet Hose Replacement in Engine Cooling.

    7. Object Number: 932444 Size: SH
  7. Disconnect the surge tank inlet hose. Refer to Radiator Surge Tank Inlet Hose/Pipe Replacement in Engine Cooling.
  8. Position both hoses aside in order to gain access.
  9. Remove the belt tensioner. Refer to Drive Belt Tensioner Replacement in Engine Mechanical - 4.6L (LH2).

    10. Object Number: 1274762 Size: SH
  10. Disconnect the brake fluid pressure sensor connector.
  11. Loosen the two insulator nuts located on each side of the brake pressure modulator valve (BPMV).

    12. Object Number: 1274764 Size: SH
  12. Disconnect and plug the brake pipes that enter the BPMV from the master cylinder (1).

    13. Object Number: 1274763 Size: SH
  13. Disconnect and plug the brake pipes that enter the BPMV from the front and rear calipers, noting their locations (1).
  14. Disconnect the electronic brake control module (EBCM) connector.
  15. Remove the BPMV/EBCM.

Installation Procedure
  1. Connect the EBCM connector.

    2. Object Number: 1274762 Size: SH
  2. Connect the brake fluid pressure sensor connector.

    3. Notice: Refer to Fastener Notice in the Preface section.

  3. Place the BPMV in the bracket and tighten the two insulator nuts.

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


    Object Number: 1274763 Size: SH
  4. Connect the brake pipes that enter the BPMV from the front and rear calipers (1).

    5. Tighten
    Tighten to 16 N·m (12 lb ft).


    Object Number: 1274764 Size: SH
  5. Connect the brake pipes that enter the BPMV from the master cylinder (1).

    6. Tighten
    Tighten to 16 N·m (12 lb ft).

  6. Install the belt tensioner. Refer to Drive Belt Tensioner Replacement in Engine Mechanical - 4.6L (LH2).
  7. Connect the upper radiator hose. Refer to Radiator Inlet Hose Replacement in Engine Cooling.

    8. Object Number: 932444 Size: SH
  8. Connect the surge tank inlet hose. Refer to Radiator Surge Tank Inlet Hose/Pipe Replacement in Engine Cooling.
  9. Install the air inlet duct. Refer to Air Cleaner Inlet Duct Replacement in Engine Controls - 4.6L (LH2).
  10. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 4.6L (LH2).
  11. Fill the coolant system. Refer to Cooling System Draining and Filling in Engine Cooling.
  12. Bleed the brake system. Refer to Hydraulic Brake System Bleeding in Hydraulic Brakes.