GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 221458  Size: SH
  1. Remove the rear seat bottom and seat back. Refer to Rear Seat Back Replacement in Seats.
  2. Important: The wheel speed sensor is serviceable only as an assembly. Do NOT attempt to service the sensor harness pigtail.

  3. Disconnect the electrical connector (1) from the wheel speed sensor.

  4. Object Number: 221454  Size: SH
  5. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  6. Pull the pigtail harness (1) for the wheel speed sensor out through the body. Remove the grommet (2).

  7. Object Number: 221451  Size: SH
  8. Remove the bolt which retains the wheel speed sensor pigtail harness (1) to the vehicle.

  9. Object Number: 603602  Size: SH
  10. Remove the wheel speed sensor retaining bolt (2) and remove the wheel speed sensor (1) from suspension knuckle.

Installation Procedure


    Object Number: 221465  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 steering knuckle (1).
  2. Tighten
    Tighten the rear wheel speed sensor bolt to 8 N·m (69 lb in).


    Object Number: 221451  Size: SH
  3. Install the pigtail harness (1) for the rear wheel speed sensor to the vehicle. Secure with 2 nuts and 2 clips.
  4. Tighten
    Tighten the nuts to 5 N·m (48 lb in).


    Object Number: 221454  Size: SH
  5. Reposition the wheel speed pigtail harness (1) through the body. Install the grommet (2).

  6. Object Number: 221458  Size: SH
  7. Lower the vehicle.
  8. Connect the wheel speed sensor electrical connector (1).
  9. Install the rear seat bottom and seat back. Refer to Rear Seat Back Replacement in Seats.
  10. Perform Diagnostic System Check - ABS .