For off-roading fans, the GMC Sierra AT4 delivers thanks to enhanced, trail-ready capability and a rugged, aggressive design. Highlights of the factory setup include a two-inch lift, all-terrain ...

If you look past the few shortcomings, you’ll see that the 2019 GMC Sierra AT4 is a true winner of a truck. This article originally appeared on Off-Road.com Share ...

These days, GMC offers six vehicles with the AT4 package: three SUVs and three pickups, including the Canyon, Sierra 1500, and Sierra HD (Heavy Duty). While each truck has its own flavor of AT4 ...