GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure

  1. Remove the evaporator core. Refer to Auxiliary Air Conditioning Evaporator Replacement .

  2. Object Number: 383143  Size: SH
  3. Gently remove the sealer packed around the thermostatic expansion valve (TXV).
  4. Important: Note the mounting location and the orientation of the capillary tube on the evaporator core.

  5. Remove the clip that retains the capillary tube to the evaporator core.
  6. Remove the nuts that retain the TXV to the evaporator core.
  7. Remove the TXV from the core.

Installation Procedure

  1. Install the TXV to the core.

  2. Object Number: 383143  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 nuts that retain the TXV to the evaporator core.
  4. Tighten
    Tighten the nuts that retain the TXV to the evaporator core to 5 N·m (44 lb in).

    Important: Install the retaining clip and the capillary tube in the location and the orientation that was noted during disassembly.

  5. Install the capillary tube and the retaining clip to the evaporator core.
  6. Pack the sealer around the TXV as found during disassembly.
  7. Install the evaporator core. Refer to Auxiliary Air Conditioning Evaporator Replacement .