2017 Sierra HD All Terrain X Specs and Features
GMC recently introduced the 2017 Sierra HD All Terrain X, the most off-road capable model in the Sierra HD lineup. The limited edition All Terrain X series will be offered on the Sierra 2500HD crew cab with four-wheel drive and customers will have the choice of either the 6.0-liter gas V8 engine or the all-new next-generation Duramax 6.6-liter V8 turbo-diesel. The new Duramax delivers a segment-topping SAE-certified 445 horsepower and an SAE-certified 910 pound-feet of torque. Read the rest of this entry
