GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Chevy C Pickup - 2WD 🢒 Brakes 🢒 Antilock Brake System 🢒 Brake Pressure Modulator Valve Replacement

Removal Procedure

    Object Number: 184208 Size: SH
  1. Disconnect the electrical connector from the combination valve.
  2. Remove the front and rear brake pipes (from master cylinder) from the combination valve.
  3. Remove the right front, left front and rear brake pipes from the tube adapters.
  4. Remove the four 10 mm bolts that fasten the EHCU bracket (7) to the vehicle mounting bracket.
  5. Lift the EHCU partially out or the engine compartment.
  6. Disconnect the four electrical connectors from EBCM (2).
  7. Fully remove the EHCU from the vehicle.
  8. Remove the three Allen bolts (11) from the combination valve (12).
  9. Remove the combination valve (12).
  10. Remove the two transfer tubes (13).

    11. Important: Do not reuse the transfer tubes. Always install new transfer tubes.

  11. Remove the three 13 mm bolts (9) that fasten the bracket to the BPMV.
  12. Remove the four T-25 Torx® bolts (1) from the EBCM.
  13. Remove the EBCM (2) from the BPMV (4). Removal may require a light amount of force.

    14. Important: Do not use a tool to pry the EBCM or the BPMV. Excessive force will damage the EBCM.

    Important: Do not reuse the EBCM mounting bolts (1). Always install new bolts.

Installation Procedure

    Object Number: 184208 Size: SH
  1. Install the new transfer tubes (13) into the combination valve (12).
  2. Install the combination valve (12) onto the BPMV (4).
  3. Install the three Allen bolts (11) that fasten the combination valve (12) to the BPMV (4).

    4. Tighten
    Tighten the three Allen bolts to 8 N·m (6 lb ft), then to 16 N·m (12 lb ft).

  4. Install the EBCM gasket (3) onto the BPMV (4).
  5. Insure gasket alignment is correct.

    6. Important: Do not use RTV or any other type of sealant on the EBCM gasket or mating surfaces.

  6. Install EBCM (2) onto BPMV (4).
  7. Install the four EBCM bolts (1).

    8. Important: Do not reuse the old mounting bolts. Always install new bolts with the new EBCM.

    Tighten
    Tighten the four bolts to 5 N·m (39 lb in) in an X-pattern.

  8. Install BPMV (4) to bracket (7).
  9. Install the three BPMV to bracket retaining bolts (9).

    10. Tighten
    Tighten the three bolts to 9 N·m (7 lb ft).

  10. Connect the four electrical connectors to the EBCM (2).
  11. Install the EHCU to the vehicle frame.

    12. Tighten
    Tighten the three bolts to 12 N·m (9 lb ft).

  12. Install the right front, left front and rear brake pipes to the tube adapters (6).

    13. Tighten
    Tighten the three brake pipe fittings to 30 N·m (22 lb ft).

  13. Install the front and rear brake pipes (from master cylinder) to the combination valve (12).

    14. Tighten
    Tighten the three brake pipe fittings to 30 N·m (22 lb ft).

  14. Connect the electrical connector (10) to the combination valve (12).
  15. Connect the negative battery cable.
  16. Bleed the brake system. Refer to Antilock Brake System Automated Bleed Procedure .

    17. Important: Verify that the combination valve metering rod is depressed during bleeding.

  17. Return to Diagnostic System Check. Refer to Diagnostic System Check .