GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 Seville 🢒 Engine 🢒 Engine Controls - 4.0L and 4.6L 🢒 Idle Air Control Valve Replacement

Removal Procedure

    Object Number: 154945 Size: SH
  1. Disconnect the IAC electrical connector (1) from the IAC valve.

    2. Object Number: 18398 Size: SH
  2. Remove the 2 IAC valve attaching screws (4).
  3. Remove the IAC valve (1) from the throttle body.
  4. Remove the IAC valve O-ring.

Installation Procedure

    Object Number: 18398 Size: SH
  1. Install the new IAC O-ring.
  2. Install the IAC valve (1) into the throttle body.
  3. Reinstall the screws into the IAC valve.

    4. 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.

    Tighten
    Tighten the screws (4) to 3 N·m (27 lb in).


    Object Number: 154945 Size: SH
  4. Connect the IAC valve electrical connector (1) to the IAC valve.