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Removal Procedure

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  1. Remove the evaporator core-auxiliary. Refer to Evaporator Core Replacement - Auxiliary .
    2. Fig 1: Disassembling/Assembling Auxiliary Heater Core Assembly
    GM814589Courtesy of GENERAL MOTORS CORP.
  2. Remove the foam insulators (3) from the evaporator core-auxiliary lines.
  3. Remove the foam insulators from the thermal expansion valve-auxiliary (4).
  4. Using a back up wrench loosen the flare nuts from the thermal expansion valve-auxiliary.
  5. Remove the auxiliary thermal expansion valve sensing bulb and retaining clip from the evaporator core-auxiliary lines.
  6. Remove the thermal expansion valve-auxiliary from the evaporator core-auxiliary.
    7. IMPORTANT: Cap or tape the open A/C refrigerant lines immediately.
  7. Remove and discard the O-ring seals from the evaporator core-auxiliary. Cap or tape the lines to prevent contamination of the evaporator core-auxiliary.
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