The GMC Sierra can be had with several engine options. The V6 is nice, the turbocharged four is pretty fine, and the two V8 engine options are sweet. But in my opinion, the best option is the Duramax 3.0-liter turbodiesel, as it offers lots of towing and fuel economy upgrades and, for those going off the pavement, low-end torque.
In the plethora of Sierra models to choose from, the AT4 sits just underneath the Denali and has serious off-road upgrades as part of the package. The Sierra AT4 has a 2? suspension lift, four-wheel drive as standard, a two-speed transfer case for more muscle when it’s needed, monotube shocks, beefier all-terrain tires, a terrain-select traction control system, and more. It’s the new off-road package GMC has been touting on several of its SUVs, but it’s definitely most prominent (and capable) on the Sierra.
