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HOMESERVICE MANUALSCHEVROLET2013SILVERADO 1500 LS, 4D PICKUP, RWDREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSHEATING, VENTILATION, AND AIR CONDITIONINGREPAIR INSTRUCTIONSAIR CONDITIONING AND HEATER MODULE ASSEMBLY REMOVAL AND INSTALLATIONINSTALLATION PROCEDURE
2013 Chevrolet Silverado 1500 LS, 4D Pickup, RWD

Installation Procedure

2013 Chevrolet Silverado 1500 LS, 4D Pickup, RWDSECTION Installation Procedure
    Fig 1: View Of HVAC Module, Nuts & Bolts
    GM1698730Courtesy of GENERAL MOTORS COMPANY
  1. If replacing the HVAC module, transfer the components from the old HVAC module as necessary.
  2. Position the HVAC module (3) into the vehicle.
    3. CAUTION:

    Refer to Fastener Caution .

  3. Install the nuts (2) to the HVAC module (3).

    Tighten 

    Tighten the nuts to 9 N.m (80 lb in).

  4. Install the bolts (1) to the HVAC module (3).

    Tighten 

    Tighten the bolts to 4 N.m (35 lb in).

  5. Reposition the acoustic foam (if applicable) to its original location.
  6. Connect the electrical harness and the ground connections.
  7. Install the HVAC module drain hose.
  8. Install the instrument panel. Refer to Instrument Panel Service Positioning (without SLT) , Instrument Panel Service Positioning (with SLT) .
  9. Install the upper intake manifold sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .
  10. Install the battery. Refer to Battery Replacement .
  11. Install the accumulator. Refer to Air Conditioning Accumulator Replacement (Non-HP2 Diesel) , Air Conditioning Accumulator Replacement (Non-HP2) .
    12. Fig 2: Identifying Heater Hose To Heater Core Fittings
    GM362171Courtesy of GENERAL MOTORS COMPANY
  12. Install the surge tank outlet hose to the heater core.

    Firmly push the quick connect onto the heater core pipe until you hear an audible click.

  13. Install the inlet heater hose to the heater core.

    Firmly push the quick connect onto the heater core pipe until you hear an audible click.

  14. Fill the engine coolant. Refer to Cooling System Draining and Filling (Vac-N-Fill Gasoline) , Cooling System Draining and Filling (Static Fill) , Cooling System Draining and Filling (Static Fill LGH, LML) , Cooling System Draining and Filling (Vac-N-Fill Diesel) .
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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.