The GMC Sierra All Terrain HD could be an excellent chance at redemption, but we wonder if there’s a market for a diesel-powered HD off-road halo truck that could probably cost more than $65,000.

The 2017 GMC Sierra HD All Terrain X couples off-road capability with the new 6.6L L5P Duramax turbo-diesel engine.

2015 Sierra All Terrain HD looks ready to hit heavy-duty trails GMC is getting its heavy-duty trucks ready for the mud this summer with its All Terrain package for the Sierra 2500HD and 3500HD ...

The brand's most popular trucks and SUVs are about to change in unexpected ways, blending electrification with familiar power ...

GMC Sierra All Terrain HD concept – Click above for high-res image gallery If you think the Ford F-150 SVT Raptor is too hot yet the Dodge Ram Power Wagon is too cold, General Motors ‘ latest ...

On the other hand, the GMC Sierra has something that neither the Power Wagon nor the Raptor can boast: specifically, 765 lb-ft of torque from the mother-of-all-diesels 6.6L Duramax lurking under ...

Solid bones here with the Sierra 1500 that we’ve driven countless times before. Everything inside is pretty much sorted, and the 5.3-liter and eight-speed trans work well together. The big ...

After the Canyon and light-duty Sierra, GMC launched the third model in the All Terrain X series in the form of an evil-looking Sierra 2500HD. For all intents and purposes, the 2017 GMC Sierra ...

GMC added even more off-road capability to its Sierra All Terrain pickup with new All Terrain X trim. The monochromatic truck, which reminds us a little bit too much of the old Avalanche, goes on ...

That's why GMC has given the Sierra HD a rough, tough makeover. The Sierra HD All Terrain X is readier than ever to take on the wilderness, and look good while it's doing it.

2017 GMC Sierra 2500 HD All Terrain X with 6.6L L5P Duramax V8 diesel with 445 hp and 910 lb-ft of torque, Goodyear Duratrac tires, sport rack with LED lights.

In an attempt to further expand and harmonize the GMC brand, the 2015 Sierra Heavy Duty will now get the All Terrain HD trim package option that the Sierra 1500 has offered for several years. All ...