GM Service Manual Online
For 1990-2009 cars only

Special Tools

J 39400-A Halogen Leak Detector

Removal Procedure

  1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging.

  2. Object Number: 798941  Size: SH
  3. Remove the evaporator tube nut (2) from the condenser (1).
  4. Remove the evaporator tube (3) from the condenser (1).

  5. Object Number: 798939  Size: SH
  6. Remove the evaporator tube nut (1) from the evaporator.
  7. Remove the evaporator tube (4) from the evaporator.
  8. Remove the evaporator tube (4) from the body retaining clip (3).
  9. Remove the evaporator tube (3) from the vehicle.
  10. Discard all of the used sealing washers.
  11. Cap all of the open connections.

Installation Procedure

  1. Install the new sealing washers. Refer to Sealing Washer Replacement.
  2. Install the evaporator tube (4) to the body retaining clip (3).
  3. Install the evaporator tube (4) to the evaporator.
  4. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 798939  Size: SH
  5. Install the evaporator tube nut (1) to the evaporator.
  6. Tighten
    Tighten the nut to 16 N·m (12 lb ft).

  7. Install the evaporator tube (3) to the condenser (1).

  8. Object Number: 798941  Size: SH
  9. Install the evaporator tube nut (2) to the condenser (1).
  10. Tighten
    Tighten the nut to 16 N·m (12 lb ft).

  11. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
  12. Leak test the fittings of the components using the J 39400-A .