GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 1998 🢒 SL1/SC1/SW1 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Brake Modulator/Master Cylinder Assembly Replacement

Removal Procedure

    Object Number: 865424 Size: SH
  1. Remove the air induction system.

    2. Object Number: 862790 Size: SH
  2. Remove the battery.

    3. Object Number: 904553 Size: SH
  3. Disconnect 2 electrical connectors from solenoid valves.
  4. Disconnect brake fluid level switch connector.
  5. Remove connector position assurance (CPA) retainer from six-way motor pack electrical connector.
  6. Disconnect 6-way electrical connector from motor pack.

    7. Important: Place a shop cloth on top of motor pack assembly to catch any dripping brake fluid.

  7. Disconnect brake pipe nuts from modulator.

    8. Notice: Plug open brake pipes to prevent brake fluid loss and contamination.

    Important: After removing brake pipe nuts, do not excessively pull or bend brake pipes away from brake control assembly.


    Object Number: 904559 Size: SH
  8. Remove 2 brake control assembly to brake booster attachment nuts.
  9. Remove brake control assembly.

Installation Procedure

    Object Number: 904559 Size: SH
  1. Position brake control assembly onto brake booster studs and install fastening nuts.

    2. Tighten
    Tighten brake booster studs to: 27 N·m (20 lb ft)


    Object Number: 904553 Size: SH

    Important: Be careful not to bend brake pipes.

  2. Position brake lines into the brake control assembly and secure brake pipe nuts.
  3. Install 6 pin electrical connector onto motor pack assembly.
  4. Check to be sure that connector is fully seated and install CPA retainer.
  5. Install electrical connector onto brake fluid level switch.
  6. Install 2 electrical connectors onto solenoid valve.

    7. Object Number: 862790 Size: SH
  7. Install the battery.

    8. Object Number: 865424 Size: SH
  8. Install the air induction system.
  9. Fill brake fluid reservoir with clean brake fluid up to the base of the reservoir filler neck.
  10. Bleed brake system as specified.
  11. Check brake fluid level.