GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Avalanche - 4WD 🢒 Preface 🢒 Cautions and Notices 🢒 HVAC Control Module Replacement

Removal Procedure
  1. Remove the instrument cluster trim plate bezel. Refer to Instrument Panel Cluster Trim Plate Bezel Replacement in Instrument Panel, Gages, and Console.
  2. Remove the instrument panel storage tray.
  3. Remove the accessory switch assembly from the instrument panel. Refer to Accessory Switch Replacement in Instrument Panel, Gages, and Console.
  4. Remove the screws from the HVAC control assembly.

    5. Object Number: 363018 Size: SH
  5. Remove the HVAC control assembly, with the following procedure:
    6. 5.1. Release the retaining tabs.
    5.2. Pull the control head out of the instrument panel carrier.
  6. Disconnect the electrical connectors from the HVAC control assembly.

Installation Procedure

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


    Object Number: 363018 Size: SH
  1. Connect the electrical connectors to the HVAC control assembly.
  2. Install the HVAC control assembly.
  3. Install the accessory switch assembly to the instrument panel. Refer to Accessory Switch Replacement in Instrument Panel, Gages, and Console.

    4. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Install the screws from the HVAC control assembly.

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

  5. Install the instrument panel storage tray.
  6. Install the instrument cluster trim plate bezel. Refer to Instrument Panel Cluster Trim Plate Bezel Replacement in Instrument Panel, Gages, and Console.

    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.

  7. Start the vehicle and let run for one minute .