GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 HUMMER 🢒 2008 🢒 H2 🢒 Power and Signal Distribution 🢒 Data Communications 🢒 HVAC Control Module Replacement

Removal Procedure

    Object Number: 810847 Size: SH
  1. Remove the center instrument panel (I/P) air outlet bezel. Refer to Instrument Panel Center Air Outlet Bezel Replacement .
  2. Remove the screws from the HVAC control module (2).
  3. Reposition the HVAC control module (2) from the I/P panel (1).
  4. Disconnect the electrical connectors from the HVAC control module (2).

Installation Procedure

    Important: The key should be in the off position when connecting the electrical connectors to ensure proper calibration.


    Object Number: 810847 Size: SH
  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. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the screws to the HVAC control module (2).

    4. 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 .