GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Tools Required

J 39500-B A/C Refrigerant Recovery, Recycling and Recharging (ACR4) System

  1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging .
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.

  3. Object Number: 422267  Size: SH
  4. Disconnect the electrical connector from the A/C pressure switch.

  5. Object Number: 419276  Size: SH
  6. Remove the A/C compressor hose nut and hose assembly from the compressor.

  7. Object Number: 419278  Size: SH
  8. Remove the A/C compressor hose nut and the hose from the condenser.

  9. Object Number: 419280  Size: SH
  10. Remove the A/C compressor hose nut and hose from the accumulator.
  11. Remove the A/C compressor hose from the vehicle.

Installation Procedure

Tools Required

J 39400 Electronic Halogen Leak Detector

  1. Install the A/C compressor hose to the vehicle.
  2. Important: Inspect the seal washers for damage before reinstalling the A/C lines and hoses.

    If any damage is noted during inspection, the suspect seal must be replaced.

    Flat washer type seals do not require lubrication.


    Object Number: 419276  Size: SH

    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.

  3. Install the A/C compressor hose and nut to the A/C compressor.
  4. Tighten
    Tighten the nut to 39 N·m (31 lb ft).


    Object Number: 422267  Size: SH
  5. Connect the electrical connector to the A/C pressure switch.

  6. Object Number: 419278  Size: SH
  7. Install the A/C compressor hose and nut to the condenser.
  8. Tighten
    Tighten the nut to 20 N·m (15 lb ft).


    Object Number: 419280  Size: SH
  9. Install the A/C compressor hose and nut to the accumulator.
  10. Tighten
    Tighten the nut to 20 N·m (15 lb ft).

  11. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  12. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging
  13. Test the A/C system for leaks using the J 39400 . Refer to Leak Testing .