GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2006 🢒 Monte Carlo 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Air Conditioning Compressor Replacement

Air Conditioning Compressor Replacement RPOs LZE, LZ4, LZ9


Object Number: 1606802 Size: MF

Callout

Component Name

Notice: Refer to Fastener Notice in the Preface section.

Fastener Tightening Specifications: Refer to Fastener Tightening Specifications .

Preliminary Procedure

  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Remove the drive belt. Refer to Drive Belt Replacement for the 3.5L engine or Drive Belt Replacement for the 3.9L engine.
  3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  4. Remove the right engine splash shield. Refer to Engine Splash Shield Replacement - Right Side .
  5. Disconnect the electrical connector.

1

Nut, A/C Compressor Hose

Tip
Remove the A/C compressor hose from the A/C compressor and cap hose.

Tighten
17 N·m (12.5 lb ft)

2

Washer, Sealing

Tip
Remove and discard sealing washers. Refer to Sealing Washer Replacement .

3

Nut, A/C Compressor

Tip
Tighten in sequence with A/C compressor mounting bolts.

Tighten
50 N·m (37 lb ft)

4

Bolt, A/C Compressor

Tip
Tighten the A/C compressor mounting bolts and nut in sequence.

Tighten
50 N·m (37 lb ft)

5

Compressor Assembly, A/C

Important: Use a low viscosity, polyalkylene glycol (PAG) oil. Use of the incorrect oil can result in compressor failure.

Tip

    • When replacing the A/C compressor, balance the compressor. Refer to Air Conditioning Compressor Oil Balancing
    • Using J 39400 leak test A/C compressor fittings.

Air Conditioning Compressor Replacement RPO LS4

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure
  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Remove the drive belt. Refer to Drive Belt Replacement - Accessory .
  3. Remove the lower radiator air baffle and deflector. Refer to Radiator Air Lower Baffle and Deflector Replacement .

    4. Object Number: 1548455 Size: SH
  4. Disconnect the A/C compressor electrical connector.

    5. Object Number: 1548415 Size: SH
  5. Remove the A/C compressor hose nut from the A/C compressor.

    6. Object Number: 1548414 Size: SH

    Important: Remove and discard all sealing washers.

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

    7. Object Number: 1548471 Size: SH
  7. Remove the stud from the A/C compressor.

    8. Object Number: 1548417 Size: SH
  8. Loosen the rear mounting bolt from the A/C compressor.

    9. Object Number: 1548416 Size: SH
  9. Remove the front mounting bolt from the A/C compressor.
  10. Remove the front mounting nut from the A/C compressor.
  11. Remove the front A/C compressor mounting stud.
  12. Install a floor stand under the right front cradle.
  13. Loosen the right front cradle bolt and lower the cradle.
  14. Remove the A/C compressor.

    15. 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: 1548417 Size: SH

    Important: Install the A/C compressor ensuring that the back of the A/C compressor is inserted onto the bolt. Do not tighten the bolt at this time.

  2. Install the A/C compressor into the vehicle.

    3. Object Number: 1548416 Size: SH

    Important: Do not tighten at this time.

  3. Install the front A/C compressor mounting bolt.
  4. Install the front A/C compressor mounting stud.

    5. Tighten
    Tighten the stud to 10 N·m (89 lb in).

  5. Install the front A/C compressor nut.

    6. Tighten

        • Tighten the nut to 50 N·m (36 lb ft).
        • Tighten the front bolt to 50 N·m (36 lb ft).
        • Tighten the rear bolt to 50 N·m (36 lb ft).

    Object Number: 1548455 Size: SH
  6. Connect the A/C compressor electrical connector.
  7. Raise the cradle into position and tighten the bolt.

    8. Tighten
    Tighten the bolt to 145 N·m (107 lb ft).

  8. Remove the floor stand from under the vehicle.

    9. Object Number: 1548471 Size: SH
  9. Install the stud to the back of the A/C compressor.

    10. Tighten
    Tighten the stud to 10 N·m (89 lb in).


    Object Number: 1548414 Size: SH
  10. Install new sealing washers. Refer to Sealing Washer Replacement .
  11. Install the A/C compressor hose to the A/C compressor.

    12. Object Number: 1548415 Size: SH
  12. Install the A/C compressor hose nut.

    13. Tighten
    Tighten the nut to 17 N·m (12.5 lb ft).

  13. Install the lower radiator air baffle and deflector. Refer to Radiator Air Lower Baffle and Deflector Replacement .
  14. Install the drive belt. Refer to Drive Belt Replacement - Accessory .
  15. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  16. Leak test the fittings of the component using J 39400-A .