GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 HUMMER 🢒 2009 🢒 H2 🢒 HVAC 🢒 Heating, Ventilation, and Air Conditioning 🢒 Air Conditioning Compressor Replacement

Special Tools

J 39400-A Halogen Leak Detector

Removal Procedure

    Object Number: 370869 Size: SH
  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
  2. Remove the cooling fan and shroud. Refer to Cooling Fan and Shroud Replacement.
  3. Install a ratchet into the air conditioning (A/C) belt tensioner adapter opening.
  4. Rotate the A/C belt tensioner clockwise in order to relieve the tension on the belt.
  5. Remove the A/C belt from the A/C compressor.
  6. Slowly release the tension on the A/C belt tensioner.
  7. Remove the A/C discharge hose bolt from the A/C compressor.
  8. Remove the A/C discharge hose from the A/C compressor.
  9. Remove the A/C suction hose bolt from the A/C compressor.
  10. Remove the A/C suction hose from the A/C compressor.
  11. Discard the sealing washers.
  12. Cap or tape all of the hose and line ends.
  13. Disconnect the electrical connector from the A/C compressor coil.

    14. Object Number: 648141 Size: SH
  14. Remove the A/C compressor mounting bolts.
  15. Remove the A/C compressor (2) from the bracket (1).
  16. If replacing the A/C compressor. Refer to Air Conditioning Compressor Oil Balancing.

Installation Procedure
  1. Add the proper amount of PAG oil to the compressor crankcase. Refer to Refrigerant System Capacities.

    2. Object Number: 648141 Size: SH
  2. Install the A/C compressor (2) to the bracket (1).

    3. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the A/C compressor mounting bolts.

    4. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).

  4. Connect the electrical connector to the A/C compressor coil.
  5. Remove the caps or tape from the hose and line ends.
  6. Install the new sealing washers. Refer to Sealing Washer Replacement.
  7. Install the A/C suction hose to the compressor.
  8. Install the A/C suction hose bolt to the A/C compressor.

    9. Tighten
    Tighten the bolt to 16 N·m (12 lb ft).

  9. Install the A/C discharge hose to the A/C compressor.
  10. Install the A/C discharge hose bolt to the A/C compressor.

    11. Tighten
    Tighten the bolt to 16 N·m (12 lb ft).

  11. Install the A/C drive belt. Refer to Air Conditioning Compressor Belt Replacement.
  12. Install the cooling fan and shroud. Refer to Cooling Fan and Shroud Replacement.
  13. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
  14. Leak test the fittings of the component using the J 39400-A .