If you think the Ford F-150 SVT Raptor is too hot yet the Dodge Ram Power Wagon is too cold, General Motors' latest concept might strike you as "just right." This, the GMC Sierra All Terrain HD concept, looks to bridge the gap between the two hardcore pickups from GM's crosstown rivals, while still offering top-notch levels of power, refinement and technology.

The four-door 2011 Sierra HD underpins the All Terrain concept, and power comes from The General's 6.6-liter Duramax diesel V8. A six-speed automatic sends the 397 horsepower and 765 pound-feet of torque to all four wheels. Versus a normal Sierra HD, ground clearance has been increased by about three inches, width has been bumped up to 73 inches (four more than normal) and the whole package rides on 20-inch aluminum wheels wrapped in 35-inch BFGoodrich KM2 mud terrain tires. Off-road performance is enhanced with the addition of Fox off-road shocks (just like the Ford Raptor).

Inside, GM has fitted the All Terrain concept with a Denali-spec interior with additional satin metal finishes and a leather-wrapped dash. What's more, a next-generation stereo system with an 80-gigabyte hard drive has been fitted inside this concept, and we'll soon be seeing this new system across the full GM product range.

Currently, there are no plans to create a production version of the All Terrain HD concept, though word is that if a road-ready version of this ultra-tough Sierra is produced, it probably wouldn't come off of a GM line – it would likely be crafted with the assistance of a second-tier firm (think: Roush). We'll be seeing the All Terrain concept in person at the Detroit Auto Show in just a few weeks, but for now, click through our high-res image gallery below, or follow the jump for the official release.