To locate it precisely:
1. Open the hood.
2. Locate the throttle body. This is the large, butterfly-valve assembly connected to the intake manifold.
3. Look closely at the throttle body. The IAC valve will be a relatively small component mounted directly on the throttle body, often near or on the side facing the engine. It may have electrical connectors attached.
A picture of a 3.8L Camaro throttle body with the IAC valve will help you visually identify it. Searching online for "2000 Camaro 3.8L throttle body diagram" or "2000 Camaro 3.8L IAC valve location" will yield helpful images.
Important Note: If you're unsure about working on your car, it's best to consult a repair manual specific to your vehicle or take it to a qualified mechanic.