GMC Sierra 1500 AT4 models are off-road-oriented variants that combine enhanced capabilities with GMC’s premium refinement to practically complement an authentic outdoor lifestyle The ...

General Motors launched the GMC Sierra AT4 with the debut of the light-duty pickup’s fourth generation for the 2019 model year. The Sierra range, including the AT4, was later refreshed for the ...

The 2020 GMC Sierra 1500 AT4 took a bit of engineering magic to fit the new powerplant under the hood, but GM's 3.0L inline-six Duramax diesel has finally met the Sierra 1500 AT4. The engine comes ...

What you might really want, though, is something in between, like a new 2020 GMC Sierra 1500 AT4 or a 2020 Ram 1500 Rebel. Ram's been doing the factory off-roader thing for 15 years with the Heavy ...

Out in the midwest, a bright red 2021 GMC Sierra 1500 AT4 Duramax Turbo-Diesel will turn more heads than a supercar. Welcomed by my new pickup brethren with raised thumbs, nonchalant nods ...

Forbes contributors publish independent expert analyses and insights. I cover the auto industry, from breaking news to car reviews. GMC serves as a sub-brand of GM, however the vehicles it ...

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 ...

UPDATE 12/18/18: GMC is now offering an Off-Road Performance package for Sierra AT4 models equipped with ... mild tweak of the all-new Sierra 1500 for less extreme off-road duty.