Where is idle air control valve on 2001 Chevy Malibu?

The Idle Air Control (IAC) valve on a 2001 Chevy Malibu is located on the throttle body. It's a small, usually rectangular, electrically controlled valve mounted directly to the throttle body. You'll likely need to remove some air intake components to see it clearly. It's usually fairly easy to spot once you have access to the throttle body itself; it'll have a wiring harness connected to it.