GMC Sierra All Terrain HD Concept is ready to play dirty

Cars are cool, but we certainly love ourselves some big, bad, hardcore pickups � you know, like the ford f 150 svt raptor. General Motors� conceptual answer to Ford�s desert-blasting pickup is this, the Sierra All Terrain HD concept, which we�ll be seeing for the first time at the Detroit auto show next week.
GMC�s brutish pickup relies on The General�s 6.6-liter Duramax diesel V8 for power � 397 horsepower and 765 pound-feet of torque, to be exact � and higher ground clearance, a wider stance and serious suspension upgrades make the All Terrain concept capable of storming through, well, all types of terrain.
Word on the street is that if GM gets up the gall to produce such a truck, it will likely be outfitted by a second-tier firm outside of the GM production lines (like a Roush ford f-150, for example). Regardless, we want this thing to be built, and badly. See a whole slate of new high-res photos for yourself in the gallery below. Oh, and don�t forget about the Ram Runner, chrysler�s foray into the niche.