Where is the catalytic converter located on a 1996 buick regal 3.8 engine?

On a 1996 Buick Regal with a 3.8L engine, the catalytic converter is typically located in the exhaust system underneath the vehicle, near the engine and closer to the front of the car. It's usually connected to the exhaust manifold (or exhaust headers) on one end and to the rest of the exhaust system on the other.

Because there might be more than one (one for each exhaust manifold, or perhaps a single, larger one), pinpointing the exact location without seeing the car is impossible. However, the general area described above is where you'll find it. Look for a metal canister-shaped component connected to the exhaust pipes. Be careful when inspecting as the catalytic converter gets very hot during operation.