GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Riviera 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 Control Assembly Replacement

Control Assembly Replacement Buick

Removal Procedure
  1. Remove the instrument panel (IP) cluster trim plate. Refer to Instrument Panel Center Trim Panel Replacement in Instrument Panel, Gauges and Console.

    2. Object Number: 404276 Size: SH
  2. Remove the retaining screws from the heating, ventilation, and air conditioning (HVAC) control assembly.
  3. Pull the assembly out from the IP.

    4. Object Number: 404278 Size: SH
  4. Disconnect the electrical connector and remove the HVAC control assembly.

Installation Procedure

    Object Number: 404278 Size: SH
  1. Connect the electrical connector to the heating, ventilation, and air conditioning (HVAC) control assembly.

    2. Object Number: 404276 Size: SH
  2. Install the HVAC control assembly into the instrument panel (IP).

    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 in order to secure the HVAC control assembly.

    4. Tighten
    Tighten the fasteners to 1.8 N·m (16 lb in).

  4. Install the IP cluster trim plate. Refer to Instrument Panel Center Trim Panel Replacement in Instrument Panel, Gauges and Console.

Control Assembly Replacement Oldsmobile

Removal Procedure
  1. Remove the instrument panel (IP) cluster trim plate. Refer to Instrument Panel Center Trim Panel Replacement in Instrument Panel, Gauges and Console.

    2. Object Number: 404280 Size: SH
  2. Remove the retaining screws from the heating, ventilation, and air conditioning (HVAC) control assembly.
  3. Pull the assembly out from the IP.

Installation Procedure

    Object Number: 404280 Size: SH
  1. Install the heating, ventilation, and air conditioning (HVAC) control assembly into the instrument panel (IP) using the guide pins.

    2. 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.

  2. Install the retaining screws in order to secure the HVAC control assembly.

    3. Tighten
    Tighten the fasteners to 1.8 N·m (16 lb in).

  3. Install the IP cluster trim plate. Refer to Instrument Panel Center Trim Panel Replacement in Instrument Panel, Gauges and Console.