GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 748559  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.
  3. Remove the brake rotor. Refer to Front Brake Rotor Replacement.

  4. Object Number: 886518  Size: MH
  5. Remove the wheel speed sensor wiring harness retainers.

  6. Object Number: 886517  Size: MH
  7. Disconnect the wheel speed sensor electrical connector.

  8. Object Number: 777335  Size: SH
  9. Remove the wheel speed sensor bolt.

  10. Object Number: 748580  Size: SH

    Caution: Carefully remove the sensor by pulling it straight out of the bore. DO NOT use a screwdriver, or other device to pry the sensor out of the bore. Prying will cause the sensor body to break off in the bore.

    Caution: Do not attempt to remove the stainless steel shim from the bearing assembly. The shim is permanently attached. If the shim is damaged or bent, replace the bearing assembly. Failure to comply will result in diminished sensor and ABS performance.

    Note: The wheel speed sensor mounts into a bore that leads to the center of the sealed bearing. Use caution when cleaning or working around the bore. Do not contaminate the lubricant inside the sealed bearing. Failure to do so can lead to premature bearing failure.

  11. Remove wheel speed sensor from the hub and bearing assembly.

Installation Procedure


    Object Number: 748580  Size: SH

    Note: The new speed sensor will have a new O-ring. Dispose of the old O-ring. Lubricate the new O-ring lightly with bearing grease prior to installation. You may also lubricate the sensor just above and below the new O-ring. DO NOT lubricate the bore.

  1. Install the wheel speed sensor into the hub and bearing assembly.
  2. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 777335  Size: SH
  3. Install the wheel speed sensor bolt and tighten to  18 N·m (13 lb ft).

  4. Object Number: 886517  Size: MH
  5. Connect the wheel speed sensor electrical connector.

  6. Object Number: 886518  Size: MH

    Note: The new speed sensor has new mounting clips already installed on the wire. DO NOT reuse the old clips.

  7. Install the wheel speed sensor wiring harness to the frame and control arm.

  8. Object Number: 748559  Size: SH
  9. Install the brake rotor. Refer to Front Brake Rotor Replacement.
  10. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.