The pictures are kind of shitty because it was on the move, but I think you can see that this is a full sized GMC pickup with what appears to be a Corvette back end bolted on.
Here's a closer view of the amazing Truckvette:
While I admire your ingenuity and crazy welding / mashup abilities I think we need to examine the obvious question of WHY THE FUCK DID YOU DO THIS?
Are you attempting to trick people into believing that Corvette released a truck version? Maybe GM would be interested in your idea! You should totally send them pictures of your Truckvette jalopymobile. If GM would have had this idea before they probably wouldn't have needed a bailout.
Somewhere an El Camino is rolling in it's grave.