GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure

  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Disconnect the electrical connector from the A/C low pressure switch.
  3. Remove the compressor hose nut from the accumulator.
  4. Remove the compressor hose from the accumulator.

  5. Object Number: 660416  Size: SH
  6. Remove the nut (2) from the evaporator fitting.
  7. Remove the accumulator bracket nut (4) from the retaining stud.
  8. Remove the accumulator (3).
  9. Remove the retaining bracket bolt (5).
  10. Remove the retaining bracket (6) from the accumulator.
  11. Remove and discard the O-ring seals.

Installation Procedure

  1. Install new O-ring seals.
  2. Install the retaining bracket (6) to the accumulator.
  3. 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.

  4. Install the retaining bracket bolt (5).
  5. Tighten
    Tighten the bolt to 10 N·m (89 lb in).


    Object Number: 660416  Size: SH
  6. Install the accumulator (3).
  7. Install the accumulator bracket nut (4).
  8. Tighten
    Tighten the nut to 9 N·m (80 lb in).

  9. Install the nut (2) to the evaporator fitting.
  10. Tighten
    Tighten the nut to 16 N·m (12 lb ft).

  11. Install the compressor hose to the accumulator.
  12. Install the compressor hose nut to the accumulator.
  13. Tighten
    Tighten the nut to 16 N·m (12 lb ft).

  14. Connect the electrical connector to the A/C low pressure switch.
  15. Evacuate and recharge the system. Refer to Refrigerant Recovery and Recharging .
  16. Leak test the fittings of the component using the J 39400-A .