Smoking from underneath the car?

You could have a plastic bag stuck the catalytic converter which is common, I would raise the car up for an inspection so you can see where the smoke is coming from. I have also seen engine oil leak from the valve covers and cause the same problem. Please use this video to help raise the car up.

https://www.youtube.com/watch?v=xLFn_bMkZc0

Please upload an image or a short video in your response, so I can see what's going on.

Thank you for the suggestion but I looked under the car nothing stuck to the converter the smoke was coming from over top of it. The research I got so far points to a head gasket issue or a bad intake manifold gasket. If you have any other suggestions I'd love to hear

1993 Chevrolet Lumina Euro 3.1 liter V6 automatic transmission front wheel drive, was driving and started smelling a burning smell when pulled over to inspect there was heavy white smoke coming from behind the engine. I looked under the car and can see smoke coming from the catalytic converter but not out the rear exhaust but from underneath at the catalytic converter.

Yes, a head gasket leak can cause smoke and the smell, here is a video to help us tell for sure if this is the problem, like I say if you upload as short video I can tell for sure as well.

https://www.youtube.com/watch?v=5zpNjYmmiYY

Please go over this guide and get back to us.