GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2005 🢒 Century 🢒 Engine 🢒 Engine Electrical 🢒 Heater and Air Conditioning Control Replacement

Removal Procedure
  1. Remove the instrument panel (I/P) trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement in Instrument Panel, Gages, and Console.

    2. Object Number: 410416 Size: SH
  2. Remove the retaining screws from the HVAC control assembly.
  3. Pull the HVAC control assembly out from the I/P.

    4. Object Number: 410422 Size: SH
  4. Disconnect the electrical connectors and the vacuum harness from the HVAC control assembly.
  5. Remove the HVAC control assembly.

Installation Procedure

    Object Number: 410422 Size: SH

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

  1. Connect the electrical connectors and the vacuum harness to the HVAC control assembly.

    2. Object Number: 410416 Size: SH
  2. Install the HVAC control assembly into the I/P.

    3. 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.

  3. Install the retaining screws to secure the HVAC control assembly.

    4. Tighten
    Tighten the screws to 2 N·m (18 lb in).

  4. Install the I/P trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement in Instrument Panel, Gages, 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 engine and run for one minute.