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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1151 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> Thermal Expansion Valve Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
  1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging .
  2. Reposition the heater hoses for clearance.
  3. Disconnect the vacuum hose from the brake booster and reposition.
    4. Fig 1: View Of Brake Booster
    GM628874Courtesy of GENERAL MOTORS CORP.
  4. Remove the evaporator outlet tube to TXV nut.
  5. Disconnect the evaporator outlet tube from the TXV.
  6. Disconnect the evaporator outlet tube from the evaporator inlet tube.
  7. Remove and discard the sealing washers.
    8. IMPORTANT: Cap or tape the open A/C refrigerant tubes immediately to prevent contamination of the refrigerant system.
  8. Cap or tape off the A/C refrigerant tubes.
    9. Fig 2: View Of TXV
    GM791147Courtesy of GENERAL MOTORS CORP.
  9. Remove the TXV to evaporator bolts.
  10. Remove the TXV from the evaporator core.
  11. Remove and discard the sealing washers.
  12. Cap or tape off the evaporator core.
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