GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Skylark 🢒 Brakes 🢒 Antilock Brake System 🢒 ABS Motor Pack Replacement

Removal Procedure

    Important: No repair of the motor pack is authorized. Replace as an assembly.

  1. Perform the scan tool gear tension relief function. Refer to Scan Tool Diagnostics .

    2. Object Number: 183893 Size: MH
  2. Remove air intake duct and disconnect the air intake temperature sensor electrical connector.
  3. Remove air box assembly from vehicle. You may have to remove the battery.
  4. Disconnect the ABS Brake Motor Pack harness connector.
  5. Remove the Torx® head screws (4) that retain the gear cover (3).
  6. Remove the gear cover (3) from the ABS brake motor pack (1).
  7. Remove Torx® head screws (5) that attach the ABS brake motor pack (1) to the hydraulic modulator (6).

    8. Important: Use care when handling the motor pack to avoid damaging the motor pack connector. Make sure brake fluid does not accidentally intrude into the motor pack. Brake fluid in the motor pack may cause a premature failure of the motor pack.

    Important: Use care when handling the motor packs. Replace the motor packs if the motor packs are dropped or damages during handling.

  8. Remove ABS brake motor pack (1) from the hydraulic modulator (6).

Installation Procedure

    Object Number: 183893 Size: MH

    Important: Use care when handling the motor packs. Replace the motor packs if the motor packs are dropped or damaged during handling.

    Align each of the three motor pack pinions with the modulator gears.

  1. Install the ABS brake motor pack (1) to the hydraulic modulator (6).

    2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install the Torx® head screws (5) that attach the ABS brake motor pack (1) to the hydraulic modulator (6).

    3. Tighten
    Tighten the Torx® head screws (5) to 5 N·m (44 lb in).

  3. Install the gear cover (3) to the ABS brake motor pack (1).
  4. Install the Torx® head screws (4) to the gear cover (3).

    5. Tighten
    Tighten the Torx® head screws (4) to 4 N·m (36 lb in).

  5. Connect the ABS brake motor pack harness connector.
  6. Install the air box assembly to the vehicle. Install the battery if necessary.
  7. Install the air intake duct and connect the Air Intake Temperature Sensor electrical connector.
  8. Perform Motor Rehome Procedure.
  9. Perform Diagnostic System Check .