GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC Suburban - 4WD 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Air Distributor Duct Replacement

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Remove the instrument cluster trim plate. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gauges and Console.
  3. Remove the radio. Refer to Radio Replacement in Entertainment.
  4. Tilt back the instrument panel. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gauges and Console.

    5. Object Number: 257092 Size: SH
  5. Remove the duct mounting screws.
  6. Release the duct from the instrument panel by squeezing the retainer.
  7. Remove the duct.

Installation Procedure

    Object Number: 257092 Size: SH
  1. Install the duct to the instrument panel.

    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 duct mounting screws.

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

  3. Roll the instrument panel forward. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gauges and Console.
  4. Install the radio. Refer to Radio Replacement in Entertainment.
  5. Install the instrument cluster trim plate. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gauges and Console.
  6. Connect the negative battery cable.