The Sierra 2500HD is the third GMC pickup to, um, pick up the All Terrain X trim, following the Canyon and Sierra 1500. Most of its newfound capability isn't technically new at all -- it gains the Z71 off-road suspension from the All Terrain package, as well as an Eaton locking rear differential and an underbody shield.
The All Terrain X trim, then, is largely an appearance package with some already-available off-road kit coming along for the ride. Upgrades specific to the All Terrain X include 18-inch black wheels, off-road tires, body-color trim pieces and a whole lot of black-painted parts -- side mirrors, B-pillars, side steps and a bed-mounted sport bar.
GMC saw fit to throw some tech into the All Terrain X package too. Standard equipment includes front and rear parking sensors, a heated steering wheel, remote start, wireless phone charging and GMC's 8-inch IntelliLink touchscreen infotainment system.
Buyers have two different engine options with the 2500HD All Terrain X, a 6.0-liter gas V8 or a 6.6-liter turbocharged diesel V8, the latter of which is all new for the 2017 model year. There's no word yet on pricing, but for comparison's sake, a base crew cab 2500HD with four-wheel drive and the gas V8 will set you back $41,825.