GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 HHR 🢒 Preface 🢒 Cautions and Notices 🢒 Brake Proportion Valve Replacement

Caution: Refer to Brake Fluid Irritant Caution in the Preface section.

Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in the Preface section.

Removal Procedure

    Object Number: 1912306 Size: SH
  1. Remove the engine control module (ECM) cover (1).

    2. Object Number: 1912307 Size: SH
  2. Disconnect the brake master cylinder secondary inlet brake pipe fitting (1).

    3. Cap the brake pipe fitting to prevent brake fluid loss and contamination.


    Object Number: 1912309 Size: SH
  3. Disconnect the RF brake pipe fitting (1).

    4. Cap the brake pipe fitting to prevent brake fluid loss and contamination.


    Object Number: 1912311 Size: SH
  4. Disconnect the LR brake pipe fitting (1).

    5. Cap the brake pipe fitting to prevent brake fluid loss and contamination.


    Object Number: 1912313 Size: SH
  5. Disconnect the RR brake pipe fitting (1).

    6. Cap the brake pipe fitting to prevent brake fluid loss and contamination.


    Object Number: 1912315 Size: SH
  6. Disconnect the LF brake pipe fitting (1).

    7. Cap the brake pipe fitting to prevent brake fluid loss and contamination.


    Object Number: 1912317 Size: SH
  7. Disconnect the brake master cylinder primary inlet brake pipe fitting (1).

    8. Cap the brake pipe fitting to prevent brake fluid loss and contamination.


    Object Number: 1912318 Size: SH
  8. Loosen, but do not remove, the upper proportioning valve bracket bolt (1).

    9. Object Number: 1912321 Size: SH
  9. Remove the lower proportioning valve bracket bolt (1).

    10. Object Number: 1912322 Size: SH
  10. Lift the proportioning valve and bracket assembly (1) and remove the assembly from the vehicle.

Installation Procedure

    Object Number: 1912322 Size: SH
  1. Install the proportioning valve and bracket assembly (1) to the vehicle.

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


    Object Number: 1912321 Size: SH
  2. Install the lower proportioning valve bracket bolt (1).

    3. Tighten
    Tighten the bolt to 25 N·m (18 lb ft).


    Object Number: 1912318 Size: SH
  3. Tighten the upper proportioning valve bracket bolt (1).

    4. Tighten
    Tighten the bolt to 25 N·m (18 lb ft).


    Object Number: 1912317 Size: SH
  4. Connect the brake master cylinder primary inlet brake pipe fitting (1).

    5. Tighten
    Tighten the fitting to 21 N·m (15 lb ft).


    Object Number: 1912315 Size: SH
  5. Connect the LF brake pipe fitting (1).

    6. Tighten
    Tighten the fitting to 21 N·m (15 lb ft).


    Object Number: 1912313 Size: SH
  6. Connect the RR brake pipe fitting (1).

    7. Tighten
    Tighten the fitting to 21 N·m (15 lb ft).


    Object Number: 1912311 Size: SH
  7. Connect the LR brake pipe fitting (1).

    8. Tighten
    Tighten the fitting to 21 N·m (15 lb ft).


    Object Number: 1912309 Size: SH
  8. Connect the RF brake pipe fitting (1).

    9. Tighten
    Tighten the fitting to 21 N·m (15 lb ft).


    Object Number: 1912307 Size: SH
  9. Connect the brake master cylinder secondary inlet brake pipe fitting (1).

    10. Tighten
    Tighten the fitting to 21 N·m (15 lb ft).


    Object Number: 1912306 Size: SH
  10. Install the ECM cover (1).
  11. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding.