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Home › Hummer › 2003 › H2 › Repair and Diagnosis › External Pages › Different car › Section 586 (HVAC Systems - Automatic) › Repair Instructions › HVAC Control Module Replacement › Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
    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 in Cautions and Notices.
  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 trim bezel. Refer to Trim Panel Replacement - Instrument Panel (I/P) Center in Instrument Panel, Gauges and Console.
    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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