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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1709 (HVAC Systems - Troubleshooting) >> Repair Instructions >> Expansion (Orifice) Tube Replacement (Body VIN Code 6) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Expansion Tube
    GM900650Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Install the shorter screen end of the expansion tube into the evaporator tube first.
  1. Install the expansion tube (4) to the evaporator tube (1).
  2. Use the J 26549-E  in order to install the expansion tube (4). See Special Tools and Equipment .
  3. Install the new O-ring seal. Refer to O-Ring Replacement .
  4. Assemble the evaporator tube at the block fitting (3).
  5. Install the nut (2) to the evaporator tube block (3).
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.

    Install the evaporator tube nut.

    Tighten:  Tighten the nut to 28 N.m (21 lb ft).

    6. Fig 2: Evaporator Tube (Long Wheel Base)
    GM871559Courtesy of GENERAL MOTORS CORP.
  6. Install the evaporator tube to the evaporator.
  7. Install the evaporator tube nut (5) to the evaporator.

    Tighten:  Tighten the nut to 28 N.m (21 lb ft).

  8. Install the coolant reservoir. Refer to COOLANT RECOVERY RESERVOIR REPLACEMENT in Engine Cooling.
  9. Install the accumulator. Refer to Accumulator Replacement .
  10. Recharge the refrigerant system. Refer to Refrigerant Recovery and Recharging .
  11. Leak test the fittings of the components using the J 39400-A  Halogen Leak Detector. See Special Tools and Equipment .
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