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. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 3.1L or Air Cleaner Assembly Replacement in Engine Controls - 3.8L.
  3. Remove the vacuum brake booster. Refer to Power Vacuum Brake Booster Replacement in Hydraulic Brakes.

  4. Object Number: 532742  Size: SH
  5. Remove the accumulator tube clip.

  6. Object Number: 409336  Size: SH
  7. Loosen the accumulator tube nut at the accumulator tube (2).
  8. Disconnect the accumulator tube from the accumulator tube.

  9. Object Number: 532742  Size: SH
  10. Remove the accumulator tube to evaporator core block fitting bolt.
  11. Disconnect the accumulator tube from the evaporator.
  12. Remove the accumulator tube tube.
  13. Remove the O-ring seal and discard.

Installation Procedure

    Important: The new O-ring seal must be coated with mineral base 525 viscosity refrigerant oil.

  1. Install the new O-ring seal. Refer to O-Ring Replacement .
  2. Install the accumulator tube tube.

  3. Object Number: 532742  Size: SH
  4. Connect the accumulator tube to the evaporator.
  5. 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.

  6. Install the accumulator tube to evaporator core block fitting bolt.
  7. Tighten
    Tighten the accumulator tube block fitting bolt to 16 N·m (12 lb ft).


    Object Number: 409336  Size: SH
  8. Connect the accumulator tube to the accumulator tube (2).
  9. Tighten the accumulator tube nut at the accumulator tube.
  10. Tighten
    Tighten the accumulator tube nut at the accumulator tube to 47 N·m (35 lb ft).


    Object Number: 532742  Size: SH
  11. Install the accumulator tube clip.
  12. Install the vacuum brake booster brakes. Refer to Power Vacuum Brake Booster Replacement in Hydraulic Brakes.
  13. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 3.1L or Air Cleaner Assembly Replacement in Engine Controls - 3.8L.
  14. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  15. Leak test the fittings of the component using J 39400-A .