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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 222 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> Recirculation Door Replacement >> Installation Procedure

Installation Procedure

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  1. Install the recirculation door to the evaporator and blower module assembly.
  2. Install the recirculation door actuator and the linkage.
  3. Install the evaporator and blower module assembly cover.
    CAUTION: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
  4. Install the screws.

    Tighten 

    Tighten the screws to 1.9 N.m (17 lb in).

  5. Install new sealing washers to the evaporator inlet and outlet tubes. Refer to O-Ring Replacement .
  6. Install the evaporator inlet tube to the evaporator.
  7. Install the evaporator inlet tube retaining nut.

    Tighten 

    Tighten the nut to 16 N.m (12 lb ft).

  8. Install the evaporator outlet tube to the evaporator.
  9. Install the evaporator outlet tube retaining nut.

    Tighten 

    Tighten the nut to 16 N.m (12 lb ft).

  10. Install new O-ring seals. Refer to O-Ring Replacement .
  11. Install the evaporator outlet hose.
  12. Install the evaporator outlet hose retaining nut to the accumulator.

    Tighten 

    Tighten the nut to 18 N.m (13 lb ft).

  13. Connect the electrical connectors to the low pressure sensor.
  14. Connect the electrical connector to the blower motor assembly.
  15. Connect the electrical connector to the blower motor resistor assembly.
  16. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  17. Leak test the fittings of the component replaced. Refer to J-39400-A  .
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