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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 222 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> Thermal Expansion Valve Replacement - Auxiliary >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Remove the left lower quarter trim panel. Refer to Trim Panel Replacement - Rear Quarter - Left .
  3. Remove the foam wrap from the auxiliary thermal expansion valve (TXV).
    4. Fig 1: View Of Auxiliary TXV Line Clamp
    GM882517Courtesy of GENERAL MOTORS CORP.
  4. Remove the auxiliary TXV line clamp screws.
  5. Remove the auxiliary TXV line clamp from the HVAC module assembly.
    6. Fig 2: View Of Auxiliary TXV Line Block Fitting
    GM882519Courtesy of GENERAL MOTORS CORP.
  6. Remove the bolt from the auxiliary TXV line block fitting.
  7. Remove the A/C lines from the auxiliary TXV.
  8. Remove and discard the sealing washers.
    9. IMPORTANT: Cap or tape the open A/C refrigerant lines immediately to prevent contamination of the refrigerant system.
  9. Cap or tape the A/C lines.
    10. Fig 3: View Of Auxiliary TXV
    GM882523Courtesy of GENERAL MOTORS CORP.
  10. Remove the auxiliary TXV to evaporator core bolts.
  11. Remove the auxiliary TXV from the evaporator core.
  12. Cap or tape off the evaporator core lines.
  13. Remove and discard the sealing washers.
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