GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2006 🢒 Avalanche - 4WD 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 HVAC Control Module Replacement

Removal Procedure

    Object Number: 659558 Size: SH
  1. Remove the instrument panel accessory trim plate. Refer to Instrument Panel Cluster Trim Plate Bezel Replacement.
  2. Remove the accessory switch from the instrument panel. Refer to Accessory Switch Replacement.
  3. Remove the screws from the HVAC control module.
  4. Depress the control assembly retaining tabs and remove the HVAC control module from the instrument panel.
  5. Disconnect the electrical connectors from the HVAC control module.

Installation Procedure

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


    Object Number: 659558 Size: SH
  1. Connect the electrical connectors to the HVAC control module.
  2. Install the HVAC control module into the instrument panel.

    3. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the screws to the HVAC control module.

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

  4. Install the accessory switch to the instrument panel. Refer to Accessory Switch Replacement.
  5. Install the instrument panel accessory trim plate. Refer to Instrument Panel Cluster Trim Plate Bezel Replacement.

    6. 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.

  6. Start the vehicle and let run for one minute.
  7. Refer to Control Module References for programming and setup information.