GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure

Important: System pressure may still exist after you evacuate the system.

  1. Recover the refrigerant from the system. Refer to Refrigerant Recovery and Recharging .
  2. Remove the drive belt. Refer to Drive Belt Replacement in Engine Mechanical.

  3. Object Number: 573938  Size: SH
  4. Disconnect the A/C compressor clutch coil connector (1).

  5. Object Number: 573960  Size: SH
  6. Disconnect the A/C high pressure switch connector (2).
  7. Remove the compressor suction/discharge hose assembly.

  8. Object Number: 281151  Size: SH
  9. Remove the compressor bolts.
  10. Remove the compressor from the bracket.
  11. If replacing the A/C compressor, drain and measure as much of the oil from the removed compressor as possible. Refer to Compressor Oil Balancing in Heating,Ventilation and Air Conditioning.

Installation Procedure

Important: 

  1. The compressor is shipped without oil..

  2. Object Number: 281151  Size: SH
  3. Add oil to the compressor.
  4. Install the compressor to the bracket.
  5. 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.

  6. Install the compressor bolts.
  7. Tighten
    Tighten the nuts to 50 N·m (37 lb ft).

  8. Install the compressor suction/discharge hose assembly.

  9. Object Number: 573960  Size: SH
  10. Connect the A/C high pressure switch connector (2).

  11. Object Number: 573938  Size: SH
  12. Connect the A/C compressor clutch coil connector (1).
  13. Install the drive belt. Refer to Drive Belt Replacement in Engine Mechanical.
  14. Connect the negative battery cable.
  15. Evacuate and recharge the system. Refer to Refrigerant Recovery and Recharging .
  16. Leak test the fitting(s) of the repaired or reinstalled component using the J 39400-A .