GM Service Manual Online
For 1990-2009 cars only

Wheel Speed Sensor Replacement 2WD

Removal Procedure

  1. Raise the vehicle.
  2. Remove the tire and wheel. Refer to Wheel Removal .

  3. Object Number: 388947  Size: SH
  4. Remove brake caliper (1). Refer to Brake Caliper Replacement .
  5. Remove the hub and rotor assembly (3). Refer to Brake Rotor Replacement .
  6. Remove wheel speed sensor cable electrical connector (2).

  7. Object Number: 388947  Size: SH
  8. Remove the wheel speed sensor harness clip rivets using a 3/16 inch drill bit.
  9. Remove clips from the wheel speed sensor wire. Save the clips for the replacement sensor.
  10. Remove wheel speed sensor mounting bolts and nut.

  11. Object Number: 388947  Size: SH
  12. Remove two splash shield mounting bolts (7).
  13. Remove wheel speed sensor and splash shield assembly (6).
  14. Remove splash shield gasket.
  15. Clean gasket and knuckle (8) surfaces thoroughly with a dry cloth.

Installation Procedure


    Object Number: 388947  Size: SH
  1. Install splash shield gasket.
  2. Install wheel speed sensor splash shield (6).
  3. 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.

  4. Install two 11 mm splash shield mounting bolts.
  5. Tighten
    Tighten the splash shield mounting bolts to 16 N·m (12 lb ft).

  6. Install wheel speed sensor mounting bolts and nut.
  7. Tighten
    Tighten the speed sensor mounting bolts to 26 N·m (19 lb ft).


    Object Number: 388947  Size: SH
  8. Install harness clips to the wheel speed sensor wire. Locate clips at paint dots on wire.
  9. Install harness clips with 3/16 inch rivets.
  10. Connect wheel speed sensor electrical connector (2).
  11. Install the hub and rotor (3). Refer to Brake Rotor Replacement .
  12. Install the brake caliper (1). Refer to Brake Caliper Replacement .
  13. Install the tire and wheel. Refer to Wheel Installation .

Wheel Speed Sensor Replacement AWD

Removal Procedure

  1. Raise the vehicle.
  2. Remove the tire and wheel. Refer to Wheel Removal .
  3. Remove brake caliper. Refer to Brake Caliper Replacement .
  4. Remove the hub and rotor (5). Refer to Brake Rotor Replacement .

  5. Object Number: 184922  Size: SH
  6. Remove wheel speed sensor mounting clips on the control arm and frame
  7. Remove wheel speed sensor electrical connector.
  8. NOTICE: Carefully remove the sensor by pulling it straight out of the bore. DO NOT use a screwdriver, or other device. Prying will cause the sensor body to break off in the bore.

    NOTICE: 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.

    NOTICE: 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.

    Important: 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.

  9. Remove wheel speed sensor from hub and bearing assembly (4).

Installation Procedure

    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.

    Important: 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.


    Object Number: 184922  Size: SH
  1. Install sensor into the hub and bearing assembly (4).
  2. Tighten
    Tighten the sensor mounting bolts to 18 N·m (13 lb ft).

    Important: The new sensor has new mounting clips already installed on the wire. Do not reuse the old clips.

  3. Connect sensor electrical connector.
  4. Connect sensor wire mounting clips to the control arm and the frame.
  5. Install the hub and rotor (5). Refer to Brake Rotor Replacement .
  6. Install the brake caliper. Refer to Brake Caliper Replacement .
  7. Install the tire and wheel. Refer to Brake Rotor Replacement .