Because its location can vary slightly depending on the exact engine configuration (there were a few different engines offered in the 2002 Malibu), you'll need to:
1. Consult your vehicle's repair manual: This is the most reliable source. The manual will show you a diagram of your specific engine bay and the IAT sensor location.
2. Look closely at your air intake system: The sensor is usually a small, cylindrical component with a wire harness attached. It's near the throttle body and/or the MAF sensor, often within the air intake piping.
3. Search online for a picture: Search "2002 Chevy Malibu IAT sensor location" along with your engine code (e.g., "2002 Chevy Malibu 3.1L IAT sensor location") for visual references. This might show you the sensor in similar vehicles with the same engine.
Remember to be careful when inspecting your air intake system. The engine bay is hot and contains moving parts. If you aren't comfortable doing this yourself, take your vehicle to a qualified mechanic for assistance.