GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 39500-B A/C Refrigerant Recovery, Recycling and Recharging (ACR4) System
    • J 39400 Electronic Halogen Leak Detector

Removal Procedure

Important: When replacing a failed compressor it will be necessary to inspect the orifice tube for material build up. Clean or replace as necessary. Refer to Expansion (Orifice) Tube Replacement .

  1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging .
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  3. Remove the accessory drive belt. Refer to Drive Belt Replacement in Engine Mechanical.
  4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  5. Remove the right wheelhouse extension. Refer to Wheelhouse Panel Replacement in Body Front End.
  6. Remove the lower air deflector. Refer to Front Air Deflector Replacement in Body Front End.
  7. Disconnect the electrical connector from the compressor.

  8. Object Number: 422267  Size: SH
  9. Disconnect the electrical connector from the A/C pressure sensor.

  10. Object Number: 450509  Size: SH
  11. Remove the retaining bolt from the wiring harness bracket.

  12. Object Number: 419276  Size: SH
  13. Remove the A/C compressor hose from the compressor.

  14. Object Number: 247295  Size: SH
  15. Remove the front compressor mounting nuts.
  16. Remove the rear compressor mounting bolt.
  17. Remove the compressor.

Installation Procedure

Important: When servicing or replacing the compressor, drain and measure the oil from the old compressor. If less than 1 fluid ounce is drained, add 2 ounces to the replacement compressor. If 1 ounce or more is drained, fill the compressor with that amount.


    Object Number: 247295  Size: SH
  1. Install the compressor.
  2. 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.

  3. Install the mounting nuts and the bolt.
  4. Tighten
    Tighten the nuts to 50 N·m (37 lb ft).

  5. Install the rear bolt to the compressor.
  6. Tighten
    Tighten the bolt to 50 N·m (37 lb ft).

    Important: Inspect the seal washers for damage before reinstalling the A/C lines and hoses.

    If any damage is noted during inspection, the suspect seal must be replaced.

    Flat washer type seals do not require lubrication.


    Object Number: 419276  Size: SH
  7. Install the A/C compressor hose to the compressor.
  8. Tighten
    Tighten the nut to 39 N·m (31 lb ft).

  9. Connect the electrical connection to the compressor.

  10. Object Number: 422267  Size: SH
  11. Connect the electrical connection to the A/C pressure sensor.

  12. Object Number: 450509  Size: SH
  13. Install the retaining bolt to the wiring harness bracket.
  14. Tighten
    Tighten the bolt to 12 N·m (9 lb ft).

  15. Lower the vehicle.
  16. Install the accessory drive belt. Refer to Drive Belt Replacement in Engine Mechanical.
  17. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  18. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  19. Test the A/C system for leaks using the J 39400 . Refer to Leak Testing .
  20. Install the lower air deflector. Refer to Front Air Deflector Replacement in Body Front End.
  21. Install the right wheelhouse extension. Refer to Wheelhouse Panel Replacement in Body Front End.