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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC - Automatic >> Repair Instructions >> HVAC Control Module Replacement >> Installation Procedure

Installation Procedure

    IMPORTANT: The key should be in the off position when connecting the electrical connectors to ensure proper calibration.
    Fig 1: HVAC Control Module & I/P Panel
    GM810847Courtesy of GENERAL MOTORS CORP.
  1. Connect the electrical connectors to the HVAC control module (2).
    2. IMPORTANT: Ensure that the HVAC control module tabs lock into place.
  2. Install the HVAC control module (2) to the I/P (1).
    3. NOTE: Refer to Fastener Notice .
  3. Install the screws to the HVAC control module (2).

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

  4. Install the center I/P air outlet bezel. Refer to Instrument Panel Center Air Outlet Bezel Replacement .
    5. IMPORTANT: Do not adjust any controls on the HVAC control module while the HVAC control module is calibrating.
    If interrupted improper HVAC performance will result.
  5. Start the vehicle and let run for one minute.
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