GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Riviera 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 Auxiliary Air Distributor Duct Replacement

Removal Procedure
  1. Remove the console assembly. Refer to Console Replacement in Instrument Panel, Gauges and Console.

    2. Object Number: 404966 Size: SH
  2. Remove the auxiliary air duct connector.
  3. Pull the carpet back away from the front of the dash. Refer to Front Floor Panel Carpet Replacement in Interior Trim.
  4. Remove the retaining fasteners from the auxiliary air duct.
  5. Remove the auxiliary air duct.

Installation Procedure

    Object Number: 404966 Size: SH
  1. Install the auxiliary air duct.

    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 nut.

    3. Tighten
    Tighten the nut to 9 N·m (80 lb in.)

  3. Install the carpet. Refer to Front Floor Panel Carpet Replacement in Interior Trim.
  4. Install the auxiliary air duct connector.
  5. Install the console assembly. Refer to Console Replacement in Instrument Panel, Gauges and Console.