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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 183 (Heating, Ventilation, And Air Conditioning) >> Repair Instructions >> Heater and Air Conditioning Evaporator and Blower Module Removal and Installation >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection
  2. Recover the refrigerant system. Refer to Refrigerant Recovery and Recharging (R-134a) Refrigerant Recovery and Recharging (R-1234yf) 
  3. Drain the engine coolant system. Refer to Cooling System Draining and Filling (Static)Cooling System Draining and Filling (GE 47716)
  4. Remove the heater inlet hose from the heater core tube. Refer to Heater Inlet Hose Replacement (LCV, LTG) Heater Inlet Hose Replacement (LF4) Heater Inlet Hose Replacement (LGX) 
  5. Remove the heater outlet hose from the heater core tube. Refer to Heater Outlet Hose Replacement (LCV) Heater Outlet Hose Replacement (LTG with KL9) Heater Outlet Hose Replacement (LTG without KL9) Heater Outlet Hose Replacement (LGX) Heater Outlet Hose Replacement (LF4) 
  6. Remove the evaporator hose assembly from the thermal expansion valve. Refer to Air Conditioning Evaporator Hose Assembly Replacement (LCV, LTG) Air Conditioning Evaporator Hose Assembly Replacement (LF4, LGX) 
  7. Disconnect the right side floor rear air outlet duct from the heater and air conditioning evaporator and blower module assembly. Refer to Floor Rear Air Outlet Duct Replacement - Right Side 
  8. Disconnect the left side floor rear air outlet duct from the heater and air conditioning evaporator and blower module assembly. Refer to Floor Rear Air Outlet Duct Replacement - Left Side 
  9. Remove the instrument panel tie bar assembly. Refer to Instrument Panel Tie Bar Replacement
    10. Fig 1: Air Conditioning Evaporator And Blower Module Assembly Bolt
    GM2833995Courtesy of GENERAL MOTORS COMPANY
  10. From within the engine compartment, remove the heater and air conditioning evaporator and blower module assembly bolt (HVAC), (1) securing the HVAC module assembly to the cowl panel.
    11. Fig 2: HVAC Module Assembly
    GM2833934Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to HVAC Module Drain Tube Caution .

  11. Remove the HVAC module assembly (1) from the vehicle.
  12. Transfer all necessary components
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