GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Important: The rear wheel speed sensor is contained within the hub/bearing assembly. The sensor is not serviceable separately. To replace a damaged rear wheel speed sensor, the entire rear hub/bearing assembly must be replaced.

Caution: Ensure that the vehicle is properly supported and squarely positioned. To help avoid personal injury when a vehicle is on a hoist, provide additional support for the vehicle on the opposite end from which the components are being removed.


    Object Number: 891504  Size: SH
  1. Raise the vehicle on a hoist.
  2. Remove the rear wheel and the tire assembly corresponding to the hub being replaced.
  3. Disconnect the electrical connector from the ABS wheel speed sensor.

  4. Object Number: 891528  Size: SH
  5. For vehicles equipped with rear disc brakes, perform the following:
  6. 4.1. Remove the brake pipe to control arm support bracket.
    4.2. Remove the caliper-to-knuckle fasteners.
    4.3. Remove the caliper, and it hang from the strut spring with mechanic's wire.

    Object Number: 891503  Size: SH
  7. Remove the drum/rotor retaining screw.
  8. Remove the drum/rotor.

  9. Object Number: 891507  Size: SH
  10. Remove the hub-to-rear axle control arm attachment nuts. Discard the nuts.
  11. Remove the hub/bearing assembly.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 891507  Size: SH

    Important: New nuts must be used as torque retention of old nuts may not be sufficient.

  1. Install the hub and brake shield to the rear axle control arm with new nuts.
  2. Tighten
    Tighten the rear hub assembly-to-knuckle nuts to 50 N·m (37 lb ft) + 30-45 degrees.


    Object Number: 891503  Size: SH
  3. Install the brake rotor/drum and tighten the retaining screw.
  4. Tighten
    Tighten the brake drum retaining fastener to 4 N·m (35 lb in).


    Object Number: 891530  Size: SH
  5. On vehicles equipped with rear disc brakes, perform the following steps:
  6. 3.1. Clean the caliper support bracket fasteners thoroughly with brake and choke cleaner P/N 21007432 or equivalent.

            Important: If Loctite 272® Threadlocker or equivalent is not available, new caliper support bracket fasteners must be used.

    3.2. Apply LOCTITE 272® Threadlocker or equivalent to the caliper support bracket fasteners.
  7. Install the caliper to the rear axle control arm, and tighten the fasteners.
  8. Tighten
    Tighten the rear caliper-to-rear axle control arm to 80 N·m (59 lb ft).


    Object Number: 891528  Size: SH
  9. Connect the brake pipe support bracket to the control arm.
  10. Tighten
    Tighten the brake pipe bracket-to-rear control arm to 8 N·m (71 lb in).


    Object Number: 891504  Size: SH

    Important: Be sure that the electrical connections are fully seated and the latch is engaged.

  11. Connect the ABS sensor electrical connector.
  12. Notice: Before installing wheels, remove rust or corrosion from wheel mounting surfaces and brake rotors/drums. Failure to do so can cause wheel nuts to loosen in service.

  13. Position the wheel and tire the assembly onto the hub.
  14. Install wheel bolts and tighten in a crisscross pattern.
  15. 8.1. Hand tighten all 5 wheel bolts.
    8.2. Use a torque wrench to tighten the wheel bolts using a crisscross pattern.

    Tighten
    Tighten the wheel bolts (initial tighten) to 63 N·m (46 lb ft).

  16. Use a torque wrench to final tighten the wheel bolts using a crisscross pattern.
  17. Tighten
    Tighten the wheel bolts (final tighten) to 125 N·m (92 lb ft).

  18. Lower the vehicle from the hoist.
  19. Program the EBTCM with the correct engine and transaxle options or DTC C0551 will set and the traction control will not operate.