Where idle air control valve 3800 series ii?

The idle air control (IAC) valve on a 3800 Series II engine is typically located on the throttle body, which is mounted on the intake manifold. It can be identified by its electrical connector and usually has a cylindrical shape. The IAC valve regulates the amount of air bypassing the throttle plate to maintain a stable idle speed. For precise location, it's best to consult a service manual specific to your vehicle's make and model.