GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Century 🢒 Brakes 🢒 Antilock Brake System 🢒 Traction Control System Modulator Replacement

Removal Procedure

    Object Number: 183893 Size: MH
  1. Remove the gear cover (3). Refer to Modulator Gear Cover Replacement .
  2. Remove the motor pack (1). Refer to Traction Control System Motor Pack Replacement

    3. Important: If the modulator must be replaced, install the two gears in the same location on the replacement modulator. Refer to Modulator Gear Cover Replacement .

    Repair of the modulator is not authorized. Replace the modulator as an assembly.

Installation Procedure

    Object Number: 183893 Size: MH
  1. With the modulator positioned upside down, and the gears facing you, rotate each modulator gear clockwise until movement stops.

    2. This procedure will cause the following conditions:

    • The pistons are positioned very close to the bottom of the modulator bore.
    • The brake bleeding procedure is simplified.
  2. Install the motor pack (1) onto the modulator (6).
  3. Install the gear cover (3) to the modulator/motor pack assembly.