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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 447 (Heating, Ventilation, And Air Conditioning) >> Repair Instructions >> Air Conditioning and Heater Module Assembly Removal and Installation (Non-HP2) >> Installation Procedure

Installation Procedure

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    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. Install the HVAC module (3).
  3. CAUTION:

    Refer to Fastener Caution .

  4. Install the nuts (2) to the HVAC module (3) and tighten to 9 (80 lb in).
  5. Install the bolts (1) to the HVAC module (3) and tighten to 4 (35 lb in).
  6. Reposition acoustic foam (if applicable) to original position or cover access hole with equivalent foam tape (1).
  7. Connect the electrical harness and the ground connections.
  8. Install the HVAC module drain hose.
  9. Install the instrument panel. Refer to Instrument Panel Service Positioning (With SLT) , Instrument Panel Service Positioning (Cadillac) .
  10. Install the upper intake manifold sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .
  11. Install the battery. Refer to Battery Replacement .
  12. Install the accumulator. Refer to Air Conditioning Accumulator Replacement (HP2) , Air Conditioning Accumulator Replacement (Non-HP2) .
  13. Fig 2: Identifying Heater Hose To Heater Core Fittings
    GM362171Courtesy of GENERAL MOTORS COMPANY
  14. 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.

  15. 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.

  16. Fill the engine coolant. Refer to Cooling System Draining and Filling (Static Fill) .