OT New GM Concept cars with V10?

Does anyone remember GM putting out a concept car in the last couple of years with a V10?

 

I think they had a Cadillac concept car that was a 16 cylinder a few years back.
Ol Blue

 

sorry doesn't help. I was headed out of a meeting last night and saw a V10 block sitting up on a shelf. I know that there are not any production vehicles with one so I thought it may be a spare from some sort of concept.

 

Maybe it's a viper block, maybe this chrysler/Gm merger rumor has been in the works longer than anyone knows.

 

I found out it is a production motor. Only thing is that you have to buy a Hummer Limo to get the motor. Anyone know of any salvage yards with one?