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HOMESERVICE MANUALSGMC2013RV CUTAWAY 4.8L ENG VIN AREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSHEATING, VENTILATION, AND AIR CONDITIONINGREPAIR INSTRUCTIONSAUXILIARY HVAC MODULE REMOVAL AND INSTALLATIONREMOVAL PROCEDURE
2013 GMC RV Cutaway 4.8L Eng VIN A

Removal Procedure

2013 GMC RV Cutaway 4.8L Eng VIN ASECTION Removal Procedure
  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
    2. Fig 1: Identifying Auxiliary HVAC Module
    GM2074813Courtesy of GENERAL MOTORS COMPANY
  2. Drain the engine coolant. Refer to Cooling System Draining and Filling (Static Fill) , Cooling System Draining and Filling (Vac N Fill) , Cooling System Draining and Filling (Static Fill Diesel) .
  3. Remove the left rear quarter trim panel. Refer to Body Side Trim Panel Replacement - Left Side .
  4. Remove the left rear corner garnish molding. Refer to Body Rear Corner Garnish Molding Replacement .
  5. Remove the air distribution duct upper. Refer to Auxiliary Air Conditioning Air Outlet Duct Replacement .
  6. Remove the air distribution duct lower. Refer to Auxiliary Heater Air Outlet Duct Replacement .
  7. Disconnect the electrical connectors from the auxiliary HVAC module (1).
    8. Fig 2: View of Cover From Underside Auxiliary HVAC Module
    GM301707Courtesy of GENERAL MOTORS COMPANY
  8. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  9. Remove the cover from the underside of the auxiliary HVAC module.
  10. Remove the one retaining nut in order to remove the auxiliary evaporator underbody rear tube assembly from the core.
  11. Disconnect the heater lines from the underside of the auxiliary HVAC module.
  12. Remove the retaining nuts from the underside of the auxiliary HVAC module.
  13. Lower the vehicle.
  14. Remove the auxiliary HVAC module.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.