GMC has taken the wraps off the 2015 Sierra All Terrain HD. It features a chrome grille surround, aluminum "underbody shields," special badging and unique 18-inch cast-aluminum wheels.

GMC has taken the wraps off the 2015 Sierra All Terrain HD.

Essentially a package on 2500 HD / 3500 HD double cab and crew cab models equipped with four-wheel drive, the All Terrain HD is distinguished by a chrome grille surround, aluminum "underbody shields," special badging and unique 18-inch cast-aluminum wheels. The model also has body color bumpers, LED-infused headlights and chrome mirror caps.

GMC only released one interior picture but they said the cabin has a "carbon fiber-inspired theme" with special door sill plates and an IntelliLink infotainment system.
The All Terrain HD has also been equipped with the Z71 Off Road package which features a skid plate, Rancho twin-tube shocks and hill descent control.

Under the hood, there's 6.0-liter Vortec V8 engine that produces up to 322 bhp (240 kW) and 380 lb-ft (515 Nm) of torque. If that's not manly enough, the optional 6.6-liter Duramax V8 diesel cranks out 397 bhp (296 kW) and 765 lb-ft (1,037 Nm) of torque.

The Sierra All Terrain HDs will go on sale this summer but there's no word on pricing.

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2015 GMC Sierra All Terrain HD unveiled