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For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2007 🢒 XLR 🢒 Preface 🢒 Cautions and Notices 🢒 Brake Pressure Modulator Valve Replacement

Brake Pressure Modulator Valve Replacement with LH2

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 .
  3. Drain the coolant system. Refer to Cooling System Draining and Filling .
  4. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  5. Remove the air inlet duct. Refer to Air Cleaner Inlet Duct Replacement .
  6. Disconnect the upper radiator hose. Refer to Radiator Inlet Hose Replacement .

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

    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 .
  7. Connect the upper radiator hose. Refer to Radiator Inlet Hose Replacement .

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

Brake Pressure Modulator Valve Replacement with LC3

Removal Procedure

Notice: Always connect or disconnect the wiring harness connector from the EBCM/EBTCM with the ignition switch in the OFF position. Failure to observe this precaution could result in damage to the EBCM/EBTCM.

Important: 

   • The ignition switch must be placed in OFF mode ONLY, before disconnecting the negative battery cable during this procedure. If the ignition switch is accidentally placed into ignition ON engine OFF mode, the control modules will be activated and disconnecting the negative battery cable will cause various DTCs to be set. Refer to Keyless Entry System Description and Operation .
   • After the ignition switch is placed into OFF mode, a waiting period of 2 minutes must be observed to allow the high-speed LAN control modules to deactivate before disconnecting or connecting the negative battery cable during this procedure. If the waiting period is not observed, one or more of these control modules may still be active, this will cause various DTCs to be set.

  1. Place the ignition switch into OFF mode . Do NOT place the ignition switch into ignition ON engine OFF mode.
  2. Wait for a minimum of 2 minutes to allow the high-speed LAN control modules to deactivate.
  3. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  4. Partially drain the cooling system. Refer to Cooling System Draining and Filling .
  5. Remove the intake manifold sight shield. Refer to Intake Manifold Sight Shield Replacement .
  6. Disconnect the upper radiator hose. Refer to Radiator Inlet Hose Replacement .

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

    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 2 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 drive belt tensioner. Refer to Drive Belt Tensioner Replacement - Supercharger .
  7. Connect the upper radiator hose. Refer to Radiator Inlet Hose Replacement .

    8. Object Number: 932444 Size: SH
  8. Connect the surge tank inlet hose. Refer to Radiator Surge Tank Inlet Hose/Pipe Replacement .
  9. Install the intake manifold sight shield. Refer to Intake Manifold Sight Shield Replacement .
  10. Fill the cooling system. Refer to Cooling System Draining and Filling .
  11. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  12. Bleed the brake system. Refer to Hydraulic Brake System Bleeding .