GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1618473  Size: SH
  1. Disconnect the negative battery cable.
  2. Evacuate the A/C system. Refer to Refrigerant Recovery and Recharging .
  3. Remove the heater/air distribution case assembly. Refer to Heater Assembly Replacement .

  4. Object Number: 1618494  Size: SH
  5. Remove the screws that secure the evaporator case assembly.

  6. Object Number: 1618497  Size: SH
  7. Remove the evaporator case cover screws.

  8. Object Number: 1618498  Size: SH
  9. Remove the evaporator core from the evaporator case.
  10. Remove the expansion valve stud bolts with the expansion valve. Refer to Thermal Expansion Valve Replacement .

Installation Procedure


    Object Number: 1618498  Size: SH
  1. Install the expansion valve. Refer to Thermal Expansion Valve Replacement .
  2. Install the evaporator core into the case.

  3. Object Number: 1618497  Size: SH
  4. Install the evaporator core case cover with the screws.

  5. Object Number: 1618494  Size: SH
  6. Install the evaporator core case with the screws.

  7. Object Number: 1618473  Size: SH
  8. Install the instrument panel carrier assembly. Refer to Instrument Panel Carrier Replacement .
  9. Connect the negative battery cable.
  10. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging .