GMC Sierra All Terrain HD

Not content to let its competitors have all the off-road fun, GM is striking back with the GMC Sierra All Terrain HD ($TBA). This new concept features suspension upgrades, a higher ground clearance, and wider stance than the typical Sierra, along with a 6.6L Duramax diesel V8 pumping out 397 hp and 765 pound-feet of torque, rugged tires, and built-in cargo boxes on the sides of the bed.

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