Yahoo Autos 2024 GMC Sierra 2500 HD AT4X: This Is It
It was just a matter of time before the 2024 GMC Sierra HD AT4X followed on the heels of the Chevrolet Silverado HD ZR2, unveiled earlier this month. Chevy, Ford and Ram have been at each other’s throats with off-road specific pickups across all segments, including heavy duty trucks, which were once content with being known for their high towing capacities. Now that American automakers are heavily invested in the off-road, heavy duty trucks have been dragged into the mud, and that means the Sierra HD is getting an AT4x badge.
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While the previous Sierra HD was available in the off-road ready AT4 trim, this all-new model will append an “X” to that, thereby rounding out the lineup of AT4X trucks available from GMC: from the mid-size Canyon AT4X, to the full-size Sierra AT4X, and, now, the fullest of sizes with the Sierra 2500 HD AT4X.
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There will also be a Sierra HD AT4X AEV Edition, which builds upon the base model with all the farkles off-roaders yearn for, straight out of the gate. Things like stamped steel bumpers with integrated recovery points and a front winch, steel skid plates to keep the steering gear and transfer case safe, and unique 18-inch wheels bearing the AEV logo wrapped in 35-inch Goodyear mud-terrains.
I guess the Sierra HD’s famous Duramax and Allison badging alone are not the draw they once were — at least, not in a world of F-Series Super Duty Tremors and Ram 2500 Power Wagons. And while the Chevy Silverado HD ZR2 could have covered whatever use-cases such trucks serve the GM faithful, it makes little sense to not release a GMC model, which offers buyers luxury on par with the off-road and towing tech found on this “professional grade” Sierra HD.
Like the Silverado HD ZR2, the Sierra HD AT4X will feature Multimatic DSSV dampers — characteristic of the ZR2 and AT4X lines — as well as beefy upper and lower control arms, steering knuckles, and e-locking differential at the rear. But it wouldn’t be a heavy duty truck without a diesel, so the first-ever Sierra HD AT4X will be available with a Duramax 6.6-liter V8 turbodiesel engine. The V8 turbodiesel will make 470 horsepower and 975 lb-ft of torque, with max torque coming on at 1,600 rpm. The standard gas engine is similar in size: it’ll be a 6.6-liter V8 that makes 401 hp and 464 lb-ft of torque.
