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The All Terrain X package takes the standard Sierra 2500HD All Terrain package and adds a whole bunch of aesthetic updates.
Sure, you could just add the All Terrain package to get most of the off-road benefits, but then your truck wouldn't look all badass-like.
The All Terrain X adds unique black wheels, off-road tires, body-color trim pieces and a whole bunch of black-painted bits.
Murdered-out components include the side mirrors, B-pillars, side steps and the bed-mounted sport bar.
You can attached LED light bars to the bed-mounted sport bar, because why wouldn't you?
GMC also threw a fair bit of tech at the All Terrain X trim.
Standard tech includes front and rear parking sensors, remote start, a heated steering wheel and wireless phone charging.
GMC's 8-inch IntelliLink touchscreen infotainment system is standard, as well.
There's no word yet on cost.
For comparison's sake, though, a base Sierra 2500HD with 4WD and a gas V8 will set you back $41,825. Click through for lots more pics from GMC.