GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Express 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Auxiliary Air Conditioning Evaporator Thermal Expansion Valve Replacement

Removal Procedure

    Object Number: 383143 Size: SH
  1. Remove the evaporator core. Refer to Auxiliary Air Conditioning Evaporator Replacement .

    2. 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.

  2. Gently remove the sealer packed around the thermo expansion valve (TXV).

    3. Important: Note the mounting location and the orientation of the tube on the core.

  3. Remove the clip retaining the capillary tube to the evaporator core.
  4. Disconnect the Evaporator tube connections from the Thermal Expansion Valve (TXV).
  5. Remove the TXV from the core.

Installation Procedure

    Object Number: 383143 Size: SH
  1. Install the TXV to the core.
  2. Connect the Evaporator tube connections to the Thermal Expansion Valve.

    3. Tighten
    Tighten the tube connections to 28 N·m (21 lb ft).

    Important: Install the clip and the tube in the location and the orientation as noted during the disassembly.

  3. Install the clip in order to retain the capillary tube to the evaporator core.
  4. Pack sealer around the TXV in the manner found during the disassembly.
  5. Install the evaporator core. Refer to Auxiliary Air Conditioning Evaporator Replacement .