Where is the idle air control valve in 2002 Pontiac Bonneville?

The Idle Air Control (IAC) valve on a 2002 Pontiac Bonneville is located on the throttle body. It's a small, usually cylindrical component mounted directly to the throttle body itself. You'll likely need to remove some air intake components to see it clearly. A picture or diagram of your specific engine bay would help pinpoint the exact location, but that's the general area you should be looking.