GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure

  1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging .
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  3. Object Number: 125807  Size: SH
  4. Remove the air baffle bolts.
  5. Remove the air baffle.

  6. Object Number: 628879  Size: SH
  7. Remove the suction hose nut.
  8. Disconnect the suction hose from the compressor.
  9. Important: Cap or tape the open A/C lines immediately, to prevent system contamination.

  10. Cap off the suction port of the compressor.
  11. Remove the discharge hose nut.
  12. Disconnect the discharge hose from the compressor.
  13. Cap off the discharge port of the compressor.
  14. Remove and discard the sealing washers.

Installation Procedure

  1. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the A/C refrigerant hose and the A/C refrigerant component.
  2. Important: Flat washer type seals do not require lubrication.

  3. Install the sealing washer to the discharge hose.

  4. Object Number: 628879  Size: SH
  5. Uncap the discharge port of the compressor.
  6. Connect the discharge hose to the compressor.
  7. 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.

  8. Install the discharge hose nut.
  9. Tighten
    Tighten the nut to 16 N·m (12 lb ft).

  10. Install the sealing washer to the suction hose.
  11. Uncap the suction port of the compressor.
  12. Connect the suction hose to the compressor.
  13. Install the suction hose nut.
  14. Tighten
    Tighten the nut to 16 N·m (12 lb ft).


    Object Number: 125807  Size: SH
  15. Install the air baffle.
  16. Install the air baffle bolts.
  17. Tighten
    Tighten the bolts to 20 N·m (15 lb ft).

  18. Lower the vehicle.
  19. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  20. Leak test the fittings of the component using J 39400-A .