It joins Canyon and Sierra 1500 this fall as the third model in GMC\’s distinctive, limited-edition All Terrain X series, offered on the Sierra 2500HD crew cab 4WD with a 6.0L gas V-8 engine or the all-new, next-generation Duramax 6.6L V-8 turbo-diesel. More powerful than ever, the new Duramax delivers a segment-topping SAE-certified 445 hp (332 kW) and an SAE-certified 910 lb.-ft. of torque (1,234 Nm).

The 2017 Sierra 2500HD All Terrain X also features GMC IntelliLink with an 8-inch-diagonal color touchscreen, Teen Driver, remote-locking tailgate, remote starting system, Rear Vision Camera, adjustable pedals, leather-appointed seats, heated front seats and wireless charging.