2009 Buick Lucerne cannot accelerate enginer just revs

If the vehicle won't rev past 3k in park or neutral, that is normal. It is the rev limiter stopping you from breaking your engine. If it does it while it is in gear, you probably have an exhaust blockage.

Sound like bad transmission. Will it go into reverse?

sounds like transmission is sliping

Your clutch needs to be replaced.

If you are doing this with no load on the engine in park or neutral then the engine computers automatic rev limiter is kicking in to prevent free wheel/no load damage to the engine components

check fuel presure if its good check for security light/codes

Sounds like a clutch problem to me.
So, with the engine off, can you select all gears? If yes, your gearbox is probably OK.
And now with the engine idling, can you select any gears with out crunching? If this is difficult, then try this next test in an area where movement forward or backwards won't be a problem.
With the engine OFF, foot ON the clutch, the handbrake OFF, and in 1st gear, start the car. BE READY TO TURN IT OFF.
If the car moved forward as you cranked the engine, then your clutch is not adjusted properly or has worn out. That is more-than-likely the smell you got before - burnt clutch disc from it slipping.
You can drive it, but every time you want to start off, you'll have to turn the engine off, select 1st then start the engine. Accelerate slowly, making sure the revs don't rise faster that you're speeding up, and change gear by judging engine revs between gears.
Don't keep driving it as it is, as you WILL have gearbox problems if you don't fix the clutch.

A CLEVELAND ENGINE IN A FAIRMONT????HMMMMMMMMMMMM....SOUNDS LIKE THE PUMP IS GOING BAD. DO YOURSELF A FAVOR AND JUK THE FMX AND GET A GOOD USED OR REBUILT C-6 INSTEAD.

I had the same problem on my 2006 Lucerne and it was the engine mount located on the front of the vehicle behind the radiator.

This is caused by Worn out Clutches inside the Automatic Transmission. You will need a Rebuild on the Tranny. This will stop these Problems.