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.

But, if diesel isn’t your thing, the 2017 GMC Sierra HD All Terrain X will also be offered with the 6.0-liter L96 V8 gas engine as well. No matter the engine choice, the All Terrain X brings ...

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.

GMC is getting its heavy-duty trucks ready for the mud this summer with its All Terrain package for the Sierra 2500HD and 3500HD. Meant to blend style, tech and ruggedness, the pack includes a lot ...

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.

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

GMC Sierra All-Terrain: First Look. The General Needs To Build This Truck. Courtesy GMC Photographer Douglas McColloch Writer May 01, 2011. See All 5 Photos.

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 ...

The only major difference with this GMC Sierra All-Terrain X and the base-spec Sierra are the $4,315 All-Terrain X, and the $2,105 All-Terrain packages. Sure, ...

Based on the GMC Sierra 2500HD, the All Terrain X package adds plenty of bits and bobs to match its sinister looks. But first, let’s talk about what’s hiding under the hood.

GMC Sierra All Terrain X coming this spring. Full-size Sierra pickup's X package adds performance exhaust, mud tires and more . By Jake Lingeman Published: Jan 28, 2016. Save Article.

It's also 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.