sierra all-terrain hd concept

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 ...

You don't have to wait until the 2011 Detroit Auto Show for a closer look at the forthcoming GMC Sierra All-Terrain HD concept. That's because our friend Mike Levine and his ...