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. Remove the air cleaner. Refer to the appropriate procedure:
  3. •  Air Cleaner Replacement for the 6.6L (LBZ and LLY) engine
    •  Air Cleaner Replacement for the 8.1L engine
    •  Air Cleaner Replacement for the 7.8L engine
    • Caterpillar® 3126 Unit Repair Manual for the 7.2L (Caterpillar) engine

    Object Number: 769799  Size: SH
  4. Remove the compressor hose assembly retaining nut (2) from the accumulator.
  5. Remove the compressor hose assembly from the accumulator.

  6. Object Number: 769337  Size: SH
  7. Remove the compressor hose assembly retaining nuts (4).
  8. Remove the compressor hose assembly (4) from the condenser (1).
  9. Plug the condenser fitting.
  10. Remove the compressor hose assembly retaining bolt from the compressor.
  11. Remove the compressor hose assembly.

Installation Procedure

  1. Remove the plug from the condenser fitting.
  2. Install the new compressor sealing washers to the compressor hose assembly. Refer to Sealing Washer Replacement .
  3. Install the compressor hose assembly.
  4. 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.

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

  7. Install the new sealing washers to the compressor hose assembly. Refer to Sealing Washer Replacement .

  8. Object Number: 769337  Size: SH
  9. Install the compressor hose assembly (4) to the condenser (1).
  10. Install the compressor hose assembly nuts (3).
  11. Tighten
    Tighten the nuts to 16 N·m (12 lb ft).


    Object Number: 769799  Size: SH
  12. Install the compressor hose assembly (3) to the accumulator (1).
  13. Install the compressor hose assembly nut (2).
  14. Tighten
    Tighten the nut to 16 N·m (12 lb ft).

  15. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  16. Install the air cleaner. Refer to the appropriate procedure:
  17. •  Air Cleaner Replacement for the 6.6L (LBZ and LLY) engine
    •  Air Cleaner Replacement for the 8.1L engine
    •  Air Cleaner Replacement for the 7.8L engine
    • Caterpillar® 3126 Unit Repair Manual for the 7.2L (Caterpillar) engine
  18. Leak test the fittings of the components using the J 39400-A .