Where is the idle air control valve on a 93 gmc vandura 2500?

On a 1993 GMC Vandura 2500, the idle air control (IAC) valve is typically located on the throttle body, which is attached to the intake manifold. It is usually positioned on the side of the throttle body and has an electrical connector as well as a couple of screws securing it in place. To access it, you may need to remove any air intake components or hoses that are in the way.