GM Service Manual Online
For 1990-2009 cars only

Rear Wheel Speed Sensor Replacement FWD

Removal Procedure


    Object Number: 829894  Size: SH

    Important: The wheel speed sensor is serviceable only as an assembly. Do NOT attempt to service the sensor harness pigtail.

  1. Disconnect the electrical connector (6) from the wheel speed sensor.
  2. Remove the rear axle hub and bearing assembly. Refer to Rear Wheel Bearing and Hub Replacement .

  3. Object Number: 840299  Size: SH
  4. Remove the wheel speed sensor from the rear axle hub.

Installation Procedure


    Object Number: 840296  Size: SH

    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.

  1. Install the wheel speed sensor to rear wheel hub.
  2. Install the rear axle hub and bearing assembly. Refer to Rear Wheel Bearing and Hub Replacement .

  3. Object Number: 829894  Size: SH
  4. Connect the wheel speed sensor electrical connector (6).
  5. Perform Diagnostic System Check - Vehicle .

Rear Wheel Speed Sensor Replacement AWD

Removal Procedure


    Object Number: 839756  Size: SH
  1. Remove the fuel tank filler pipe protector bolts (2) and remove the fuel tank filler pipe protector (1).
  2. Remove the rear seat bottom and seat back. Refer to Rear Split Folding Seat Back Replacement .

  3. Object Number: 839762  Size: SH

    Important: The wheel speed sensor is serviceable only as an assembly. Do NOT attempt to service the sensor harness pigtail.

  4. Disconnect the electrical connector (1) from the wheel speed sensor.
  5. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  6. Pull the sensor harness and grommet out through the body.

  7. Object Number: 839772  Size: SH
  8. Remove the bolt (2) which retains the wheel speed sensor harness (1) to the vehicle.

  9. Object Number: 839777  Size: SH
  10. Remove the bolt (1) and nut (2) which retains the wheel speed sensor harness to the upper arm and suspension member.

  11. Object Number: 839787  Size: SH
  12. Remove the wheel speed sensor retaining bolt (1) and remove the wheel speed sensor (2) from suspension knuckle.

Installation Procedure


    Object Number: 839787  Size: SH

    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.

  1. Install the wheel speed sensor (2) to the steering knuckle.
  2. Tighten
    Tighten the rear wheel speed sensor bolt (1) to 8 N·m (71 lb in).


    Object Number: 839777  Size: SH
  3. Install the bolt (1) and nut (2) which retains the wheel speed sensor harness to the upper arm and suspension member.
  4. Tighten
    Tighten the bolt and nut bolt to 5 N·m (44 lb in).


    Object Number: 839772  Size: SH
  5. Install the bolt (2) which retains the wheel speed sensor harness (1) to the vehicle.
  6. Tighten
    Tighten the bolt and nut bolt to 5 N·m (44 lb in).


    Object Number: 839762  Size: SH
  7. Reposition the wheel speed pigtail harness through the body. Install the grommet.
  8. Connect the wheel speed sensor electrical connector (1).
  9. Lower the vehicle.
  10. Install the rear seat bottom and seat back. Refer to Rear Split Folding Seat Back Replacement .

  11. Object Number: 839756  Size: SH
  12. Install the fuel tank filler pipe protector (1). Secure with 3 bolts (2).
  13. Perform the Diagnostic System Check - Vehicle .