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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 INSTALLATIONINSTALLATION PROCEDURE
2013 GMC RV Cutaway 4.8L Eng VIN A

Installation Procedure

2013 GMC RV Cutaway 4.8L Eng VIN ASECTION Installation Procedure
    Fig 1: View of Cover From Underside Auxiliary HVAC Module
    GM301707Courtesy of GENERAL MOTORS COMPANY
  1. Install the auxiliary HVAC module.
  2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
    3. CAUTION:

    Refer to Fastener Caution .

  3. Install the retaining nuts to the underside of the auxiliary HVAC module and tighten to 10 N.m (89 lb in).
  4. Connect the heater lines to the underside of the auxiliary heater.
  5. Install the one retaining nut to the auxiliary evaporator underbody rear tube assembly to the core and tighten to 28 N.m (21 lb ft).
  6. Install the cover to the underside of the auxiliary HVAC module.
  7. Lower the vehicle.
    8. Fig 2: Identifying Auxiliary HVAC Module
    GM2074813Courtesy of GENERAL MOTORS COMPANY
  8. Connect the electrical connectors to the auxiliary HVAC module (1).
  9. Install the air distribution duct upper. Refer to Auxiliary Air Conditioning Air Outlet Duct Replacement .
  10. Install the air distribution duct lower. Refer to Auxiliary Heater Air Outlet Duct Replacement .
  11. Install the left rear corner garnish molding. Refer to Body Rear Corner Garnish Molding Replacement .
  12. Install the left rear quarter trim panel. Refer to Body Side Trim Panel Replacement - Left Side .
  13. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  14. Fill 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) .
RENDER: 1.0x

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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.