GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 LeSabre 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 Air Cleaner Inlet Duct Replacement

Removal Procedure

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

    2. Object Number: 179042 Size: SH
  2. Grasp and remove the IAT sensor (2) with a twisting and pulling motion from the intake air duct (1).

    3. Object Number: 210987 Size: SH
  3. Loosen the air cleaner intake duct clamps.
  4. Remove the air cleaner intake duct from air cleaner and rotate duct upwards.
  5. Remove the inlet snorkel by pulling upwards and inboard.

Installation Procedure

    Object Number: 55463 Size: SH
  1. Install the air cleaner intake duct on throttle body.

    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. Rotate the air cleaner intake duct down and install the intake air duct onto the air cleaner.

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


    Object Number: 179042 Size: SH
  3. Position and insert the IAT sensor (2) into the rear air intake duct (1).

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