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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 >> HVAC Module 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.
IMPORTANT: Cap or tape the open air conditioning (A/C) components immediately in order to prevent system contamination.
    Fig 1: Removing/Installing Auxiliary Heater Inlet/Outlet hoses
    GM1548579Courtesy of GENERAL MOTORS CORP.
  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Remove the left rear quarter trim panel.
  3. Drain the cooling system. Refer to Draining and Filling Cooling System (Static Fill) or Draining and Filling Cooling System (Vac-N-Fill) in Engine Cooling.
  4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  5. Remove the level ride air compressor. Refer to Air Compressor Replacement in Automatic Level Control.
  6. Remove the auxiliary A/C line block fitting bolt.
  7. Remove the A/C line (1) block fitting.
  8. Remove and discard the sealing washers.
  9. Cap or tape the A/C lines.
  10. Disconnect the auxiliary heater hoses (2) from the heater core pipes using the J 38185  or SA9111E.
  11. Lower the vehicle.
    12. Fig 2: Locating A/C Outlet Pillar Duct
    GM1548551Courtesy of GENERAL MOTORS CORP.
  12. Remove the auxiliary A/C outlet pillar duct bolts (1).
    13. Fig 3: Locating A/C Outlet Pillar Duct
    GM1548553Courtesy of GENERAL MOTORS CORP.
  13. Remove the auxiliary A/C outlet pillar duct (2).
  14. Remove the auxiliary A/C outlet duct bolts (1).
  15. Remove the auxiliary A/C outlet duct (2).
  16. Disconnect the auxiliary blower motor electrical connector.
  17. Disconnect the auxiliary blower motor resistor electrical connector.
  18. Disconnect the auxiliary temperature actuator electrical connector.
    19. Fig 4: View Of HVAC Module Assembly
    GM882525Courtesy of GENERAL MOTORS CORP.
  19. Remove the HVAC module assembly bolts and nut.
  20. Remove the left power sliding door (PSD) module from the mounting bracket and reposition aside, if equipped.
  21. Remove the HVAC module assembly from the vehicle.
  22. Remove and discard the HVAC module assembly to body seals.
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