2020 GMC Sierra AT4 Diesel Offers Serious Off-Road Awesomeness
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 …