GM Service Manual Online
For 1990-2009 cars only

Wheel Speed Sensor Replacement Rear Wheels

Removal Procedure


    Object Number: 305363  Size: SH

    Important: The rear wheel speed sensors and rings are integral with the hub and bearing assemblies.

    If a speed sensor or a ring needs replacement, you must replace the entire hub and bearing assembly.

  1. Raise and support the vehicle on a suitable hoist. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the rear tire and wheel assembly.
  3. Remove the rear wheel speed sensor electrical connector (1). Located next to rear strut (2).

  4. Object Number: 230412  Size: SH
  5. Remove the hub and bearing assembly (1). Refer to Rear Wheel Bearing and Hub Replacement Replacement in Rear Suspension for removing hub/bearing/speed sensor assembly.

Installation Procedure


    Object Number: 230412  Size: SH
  1. Install the hub and bearing assembly (1) to the vehicle. Refer to Rear Wheel Bearing and Hub Replacement in Rear Suspension for installing hub/bearing/speed sensor assembly.

  2. Object Number: 305363  Size: SH
  3. Install the rear wheel speed sensor electrical connector (1).
  4. Install the wheel and tire assembly.
  5. Lower the vehicle. Refer to Lifting and Jacking the Vehicle
  6. Turn the ignition switch to the ON position with the engine off.
  7. Perform the Diagnostic System Check. Refer to Diagnostic System Check - ABS .

Wheel Speed Sensor Replacement Front

Removal Procedure


    Object Number: 161069  Size: SH

    Important: The front sensor is serviceable only as an assembly. DO NOT attempt to service the sensor harness pigtail as it is part of the sensor.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Disconnect the front electrical connector.
  3. Remove the bolt retaining the sensor pigtail wire.
  4. Remove the 2 bolts retaining sensor to the steering knuckle.
  5. Remove the sensor.

Installation Procedure


    Object Number: 161069  Size: SH

    Important: Make sure the sensor guide pins are properly aligned and sensor is seated.

  1. Install the front wheel speed sensor.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the sensor retaining bolts.
  4. TIGHTEN
    Tighten to 70 N·m (52 lb ft).

  5. Reconnect the electrical connector to front wheel speed sensor.