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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 92 (Heating, Ventilation, And Air Conditioning) >> Repair Instructions >> HVAC Module Assembly Replacement >> Installation Procedure

Installation Procedure

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    Fig 1: View Of HVAC Module, Nuts & Bolts
    GM1698730Courtesy of GENERAL MOTORS CORP.
  1. If replacing the HVAC module, transfer the components from the old HVAC module as necessary.
  2. Install the HVAC module (3).
    3. NOTE: Refer to Fastener Notice .
  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 acoustic foam (if applicable) to original position or cover access hole with equivalent foam tape (1).
  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 (With SLT) or Instrument Panel Service Positioning (Cadillac) .
  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 Accumulator Replacement .
    12. Fig 2: Identifying Heater Hose To Heater Core Fittings
    GM362171Courtesy of GENERAL MOTORS CORP.
  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 Draining and Filling Cooling System .
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