GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1996 🢒 Corsica 🢒 Engine 🢒 Engine Controls - 2.2L 🢒 Idle Air Control Valve Replacement

Removal Procedure

    Notice: If the IAC valve has been in service: DO NOT push or pull on the IAC valve pintle. The force required to move the pintle may damage the threads on the worm drive. Also, DO NOT soak the IAC valve in any liquid cleaner or solvent, as damage may result.


    Object Number: 18773 Size: SH
  1. Remove the IAC valve electrical connector.
  2. Remove the IAC valve attaching screws (2).
  3. Remove the IAC valve assembly (1).

Installation Procedure

    Important: 

       • Clean the IAC valve O-ring sealing surface, the pintle valve seat, and the air passage.
       • The IAC valve may be cleaned, using GM cleaner 1052626 or GM X-66A. Use a shop towel or parts cleaning brush to remove heavy deposits.
       • Shiny spots on the pintle or seat are normal, and do not indicate misalignment or a bent pintle shaft.
       • Whenever the air passage has heavy deposits, remove the throttle body for complete cleaning.
       • Inspect the IAC valve O-ring for cuts, cracks, or distortion. Replace if damaged.
       • Whenever installing a new IAC valve, be sure to replace it with an identical part. IAC valve pintle shape and diameter are designed for the specific application.


    Object Number: 18773 Size: SH
  1. Lubricate IAC valve O-ring (3) with clean engine oil.
  2. Install the IAC valve assembly (1).
  3. Install the IAC valve attaching screws (2).

    4. Tighten
    Tighten the IAC valve attaching screws to 3.0 N·m(27 lb in ).

    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.

  4. Connect the electrical connector.
  5. Reset IAC valve pintle position:
    6. 5.1. Turn the ignition switch to the ON position (engine OFF).
    5.2. Turn the ignition OFF for ten seconds.
    5.3. Start the engine and check for proper idle operation.

    Object Number: 12637 Size: SH
  6. Measure the distance between the tip of the IAC valve pintle and mounting flange (1). Whenever the distance is greater than 28 mm, use finger pressure in order to slowly retract the pintle. The force required to retract the pintle of a new valve will not cause damage to the valve.