GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Riviera 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Throttle Body Air Inlet Screen Replacement

Removal Procedure

    Object Number: 179039 Size: SH
  1. Remove the IAT sensor electrical connector (1) from the IAT sensor (2).

    2. Object Number: 210987 Size: SH
  2. Remove the intake air duct.

    3. Object Number: 180140 Size: SH
  3. Remove the snap ring (3) from the throttle body (1).
  4. Remove the throttle body air inlet screen (2) from the throttle body.

Installation Procedure

    Object Number: 180140 Size: SH
  1. Install the air inlet screen (2) and the snap ring (3) into the throttle body (1).

    2. Object Number: 210987 Size: SH

    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 air intake duct.

    3. Tighten
    Tighten the air intake duct clamp to 2 N·m (18 lb in).


    Object Number: 179039 Size: SH
  3. Connect the IAT sensor electrical connector (1) to the IAT sensor (2).