GM Service Manual Online
For 1990-2009 cars only

Air Conditioning Compressor Replacement L26

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure

  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Remove the drive belts. Refer to Drive Belt Replacement .
  3. Remove the splash shield from the right side of the engine. Refer to Engine Splash Shield Replacement in Body Front End.
  4. Remove the hose nut from the A/C compressor.
  5. Remove the hose from the A/C compressor.
  6. Important: Remove and discard all sealing washers.

  7. Disconnect the electrical connector from the A/C compressor.

  8. Object Number: 1199944  Size: SH
  9. Loosen the rear mounting bolt from the A/C compressor.
  10. Remove the front mounting bolt from the A/C compressor.
  11. Remove the front mounting nut from the A/C compressor.
  12. Remove the A/C compressor.
  13. Important: Replacement compressors are shipped with polyalkylene glycol (PAG) oil

  14. If replacing the compressor, balance the compressor oil. Refer to Air Conditioning Compressor Oil Balancing .

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.

  1. Install the compressor drain plug.
  2. Tighten
    Tighten the drain plug to 16 N·m (12 lb ft).

  3. Position the A/C compressor onto the front A/C compressor mounting stud and the rear A/C compressor mounting bolt.
  4. Install the A/C compressor front bolt.
  5. Tighten
    Tighten the bolts to 50 N·m (36 lb ft).

  6. Install the A/C compressor front mounting nut.
  7. Tighten
    Tighten the nut to 50 N·m (36 lb ft).

  8. Tighten the A/C compressor rear bolt.
  9. Tighten
    Tighten the bolt to 50 N·m (36 lb ft).

  10. Install new sealing washers. Refer to Sealing Washer Replacement .

  11. Object Number: 1199944  Size: SH
  12. Install the hose to the A/C compressor.
  13. Install the nut to the A/C compressor hose.
  14. Tighten
    Tighten the nut to 17 N·m (12.5 lb ft).

  15. Connect the electrical connector to the A/C compressor.
  16. Install the splash shield to the right side of the engine. Refer to Engine Splash Shield Replacement in Body Front End.
  17. Install the drive belts. Refer to Drive Belt Replacement .
  18. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  19. Leak test the fittings of the component using J 39400-A .

Air Conditioning Compressor Replacement LY7

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure

  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Remove the drive belts. Refer to Drive Belt Replacement .
  3. Remove the splash shield from the right side of the engine. Refer to Engine Splash Shield Replacement in Body Front End.
  4. Disconnect the electrical connector from the A/C compressor.

  5. Object Number: 1539030  Size: SH
  6. Remove the compressor hose nut from the A/C compressor.
  7. Important: Remove and discard all sealing washers.

  8. Remove the compressor hose from the A/C compressor.

  9. Object Number: 1539064  Size: SH
  10. Loosen the rear mounting bolt (1) from the A/C compressor.
  11. Remove the front mounting bolt (3) from the A/C compressor.
  12. Remove the front mounting nut (2) from the A/C compressor.
  13. Remove the A/C compressor.
  14. Important: Replacement compressors are shipped with polyalkylene glycol (PAG) oil

  15. If replacing the compressor, balance the compressor oil. Refer to Air Conditioning Compressor Oil Balancing .

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.

  1. Install the compressor drain plug.
  2. Tighten
    Tighten the drain plug to 16 N·m (12 lb ft).


    Object Number: 1539064  Size: SH
  3. Position the A/C compressor onto the front A/C compressor mounting stud and the rear A/C compressor mounting bolt (1).
  4. Install the A/C compressor front bolt (3).
  5. Tighten
    Tighten the bolts to 50 N·m (36 lb ft).

  6. Install the A/C compressor front mounting nut (2).
  7. Tighten
    Tighten the nut to 50 N·m (36 lb ft).

  8. Tighten the A/C compressor rear bolt.
  9. Tighten
    Tighten the bolt to 50 N·m (36 lb ft).


    Object Number: 1539030  Size: SH
  10. Install new sealing washers. Refer to Sealing Washer Replacement .
  11. Install the compressor hose to the A/C compressor.
  12. Install the nut to the A/C compressor hose.
  13. Tighten
    Tighten the nut to 17 N·m (12.5 lb ft).

  14. Connect the electrical connector to the A/C compressor.
  15. Install the splash shield to the right side of the engine. Refer to Engine Splash Shield Replacement in Body Front End.
  16. Install the drive belts. Refer to Drive Belt Replacement .
  17. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  18. Leak test the fittings of the component using J 39400-A .