That's some of that near-the-border stuff for sure.
The difference in shades of black amost makes the truck look photoshopped, but I have no doubt it's real.
There's a GMT400 on Houston CL that has the newer style Tahoe front end, Lambo doors, etc. and they did it on a base model - crank windows, V6...
EDIT - whoop! And here it is ->
http://houston.craigslist.org/cto/4520042145.html I like how they call it a Silverado..
Richard