The casual observer may not have noticed, but the GMC Sierra AT4X now has its own grille design, an aesthetic departure from the regular Sierra AT4. When the AT4X first joined the lineup in 2022 ...

There is a significant boost in fuel economy with the diesel. On the AT4X, the Duramax drive system is rated at 19 mpg city/20 highway/19 combined, compared with 14 city/17 highway with the ...

The Sierra 2500HD AT4X AEV with the diesel V-8 got to 60 ... and its burliest version is good for 22,500 pounds of towing. Fuel Economy and Real-World MPG Since the EPA doesn't test vehicles ...

Related: 2022 GMC Sierra 1500 Denali Ultimate, AT4X: Up Close Now, with the 2022 versions of GM’s big trucks, that issue has been soundly resolved. Completely new interiors have arrived for the ...

fuel economy for the off-road-oriented AT4X drops to 17/17/17 mpg. The 2024 Ford and Toyota both outperform the Canyon by an mpg or two, while the (pricey) Tacoma hybrid bests the GMC in both ...

Our 2024 GMC Sierra AT4X AEV Edition test truck featured the optional Duramax 3.0-liter turbodiesel engine with 305 horsepower and 495 lb-ft of torque. Although the Sierra AT4X AEV Edition boasts ...

Any truck is a big investment, but in the GMC Sierra HD AT4X AEV's case, the investment isn't the only thing that's big. At 8720 pounds, this Sierra puts the heavy in heavy-duty. With its mirrors ...