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Home >> Chevrolet >> 2004 >> Optra Base, Automatic >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC Systems >> Repair Instructions >> Air Conditioning and Heater Module Assembly Removal and Installation >> Installation Procedure

Installation Procedure

    Fig 1: View Of Heater/Air Distributor Case Assembly
    GM1308287Courtesy of GENERAL MOTORS CORP.
  1. Position the heat/air distributor case assembly in the vehicle.
    2. IMPORTANT: Avoid damaging the heater core pipes by making sure they do not contact the cowl opening.
  2. Slowly raise the heater/air distributor case assembly into position against the cowl and hold it in position while the screws are installed and tighten from the engine side of the cowl.
  3. Install the high pressure and low pressure pipe.
    4. NOTE: Refer to Fastener Notice in Cautions and Notices.
  4. Install the heater/air distributor case assembly screws at the side of evaporator through the cowl from the engine compartment side.

    Tighten:  Tighten the heater/air distributor case assembly screws to 4 N.m (35 lb in)  .

    5. Fig 2: View Of HVAC Module Assembly
    GM1308288Courtesy of GENERAL MOTORS CORP.
  5. Install the heater/air distributor case assembly screws at the side of the heater core pipes through the cowl from the engine compartment side.

    Tighten:  Tighten the heater/air distributor case assembly screws to 4 N.m (35 lb in)  .

  6. Install the 2 heater hoses.
  7. Slide the heater hose clamps into position.
  8. Connect the rear duct connector.
  9. Install the instrument panel and tie-bar. Refer to Instrument Panel Assembly Replacement in Instrument Panel, Gauges and Console.
  10. Fill the cooling system. Refer to Cooling System Draining and Filling (Gasoline Engines ) in Engine Cooling.
  11. Connect the negative battery cable.
  12. Operate the controls to verify the proper function of the heating and ventilation systems.
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