LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hummer >> 2003 >> H2 >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC Systems - Automatic >> Repair Instructions >> HVAC Control Module Replacement >> Installation Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

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.
  3. Install the HVAC control module (2) to the I/P (1).
  4. NOTE: Refer to FASTENER NOTICE .
  5. Install the screws to the HVAC control module (2).

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

  6. Install the center I/P trim bezel. Refer to Trim Panel Replacement - Instrument Panel (I/P) Center .
  7. 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.
  8. Start the vehicle and let run for one minute.