Where is the Cadillac converter on a 1986 Chevy Celebrity?

On a 1986 Chevy Celebrity, the catalytic converter is located in the exhaust system, underneath the vehicle, near the rear of the engine compartment and before the muffler. It's usually close to the transmission and might be fairly close to the floor pan. Because of its location, you'll need to get under the car to see it. You might even find it partially shielded by heat shielding.