When you just have to have the biggest and baddest American pick up truck on your block there are a few options to choose from. Ford fans have the F-150 SVT Raptor and Mopar enthusiasts can pick up the Dodge Ram Power Wagon and now GM has come to the party with a new macho concept the GMC Sierra All Terrain HD.

The standard four-door 2011 Sierra HD (that’s Heavy Duty not High Definition) underpins the All Terrain concept, and power comes from GM’s no nonsense 6.6-litre Duramax diesel V8. The engine sends 397 horsepower and 765 pound-feet of torque to all four wheels through a six-speed automatic gearbox. Ground clearance and width has been increased over the standard Sierra, and the whole package rides on 20-inch aluminum wheels wrapped in 35-inch BFGoodrich KM2 mud terrain tyres. Off-road ability is increased by adding Fox off-road shocks.

Inside, the All Terrain concept is classy with additional satin metal finishes and a leather-wrapped dashboard. It also receives a next-generation stereo system with an 80-gigabyte offering plenty of room for the full Kenny Rodgers back catalogue and this new entertainment system will be rolled out across the full GM product range.

Currently, the All Terrain HD concept is remaining just a concept and is set to be revealed at the Detroit Auto Show in the new year.