GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 33027-A Clutch Hub Holding Tool
    • J 33013-B Hub and Drive Plate Remover and Installer

Removal Procedure

  1. Remove the drive belt. Refer to Drive Belt Replacement in Engine Mechanical.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Remove the right front fender liner. Refer to Front Fender Liner Replacement in Body Front End.

  4. Object Number: 405378  Size: SH
  5. Install the J 33027-A , to hold the clutch hub and drive plate in place.
  6. Remove the compressor shaft nut.

  7. Object Number: 405384  Size: SH
  8. Install the J 33013-B into the hub.
  9. Hold the outer body of J 33013-B using a wrench.
  10. Turn the center screw in order to remove the compressor clutch.
  11. Remove the shaft key and retain for reassembly.

Installation Procedure


    Object Number: 405419  Size: SH
  1. Install the shaft key into the hub groove (4). Allow the key to project 3.2 mm (1/8 in) out of the keyway.
  2. Clean the surfaces of the clutch plate (1) and the clutch rotor (2) before installing the clutch plate and hub assembly.
  3. Align the shaft key in the clutch plate (4) with the keyway in the compressor shaft (3) and install the clutch plate.
  4. Remove the J 33013-B remover-installer center screw and reverse the body direction on the center screw.

  5. Object Number: 405423  Size: SH
  6. Install the J 33013-B remover-installer with bearing (1) into the clutch plate (3) and hub assembly (2).
  7. Back the body of the J 33013-B remover-installer off then thread the center screw several turns into the end of the compressor shaft.
  8. Hold the center screw with a wrench and tighten the hex portion of the J 33013-B body to press the hub onto the shaft.
  9. Remove the J 33013-B and insure that the shaft key is still in place in the keyway.
  10. Reinstall the J 33013-B .

  11. Object Number: 187363  Size: SH
  12. Place a feeler gage between the clutch plate and the clutch rotor.
  13. Hold the center screw with a wrench and tighten the hex portion of the J 33013-B body until the air gap between the clutch plate and the clutch rotor is within 0.40-0.50 mm (0.015-0.020 in). Make sure that the air gap is even all around the clutch plate and hub assembly.
  14. Remove the J 33013-B .

  15. Object Number: 405378  Size: SH
  16. Install the J 33027-A to hold the compressor clutch hub.
  17. 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.

  18. Install the compressor shaft nut.
  19. Tighten
    Tighten the nut to 18 N·m (13 lb ft).

  20. Remove the J 33027-A from the compressor.
  21. Spin the pulley rotor by hand in order to ensure that the rotor does not rub against the clutch plate.
  22. Install the right front fender liner. Refer to Front Fender Liner Replacement in Body Front End.
  23. Lower the vehicle.
  24. Install the drive belt. Refer to Drive Belt Replacement in Engine Mechanical.