An electronically locking rear differential is part of the AT4X kit too, as is an Off-Road drive mode to help tackle tough obstacles. The bottom of the truck is also better protected from taking a beating thanks to the addition of an aluminum front bash plate and a larger steel skid plate for the transfer case. Other bits exclusive to the 2024 Sierra 2500HD AT4X include a revised front suspension with enhanced steering knuckles as well as unique upper and lower control arms. Also found on professional race cars and trucks, these fancy shocks feature three separate spool valves that better help on-road composure and withstand off-road abuse. The AT4X's suspension is raised 1.5 inches, and the truck is buoyed by sophisticated Multimatic DSSV spool-valve dampers. Both feature black 18-inch wheels wrapped with chunky 35-inch Goodyear Wrangler Territory M/T tires. The Sierra 2500HD AT4X is outfitted similar to the recently revealed 2024 Chevy Silverado 2500HD ZR2. Just a Sierra AT4X towing in the mountains. The new AT4X is only available on the 2500HD configured with the crew-cab body style and the standard-length cargo bed. Previously, the heavy-duty pickup truck's top off-road option was the regular AT4, which is offered on both the 2500HD and 3500HD. While the 2024 model year marks the first time GMC's AT4X badge has appeared on a Sierra HD, the dirt-oriented model was introduced on the 2022 Sierra 1500. Able to tow up to 18,500 pounds and haul a payload of up to nearly 3300 pounds, the new AT4X and its AEV-enhanced counterpart are as capable as most other three-quarter-ton Sierras, but they also come with the necessary equipment to warrant some added fun when the workday is done. That is unless Jack drives a 2024 GMC Sierra 2500HD AT4X or an Extreme AEV Edition, which together debut as the most off-road-focused models in the brand's heavy-duty lineup. The Extreme AEV Edition's add-ons come from aftermarket supplier AEV and include exclusive 18-inch wheels, stronger skid plates, and unique steel bumpers.Īll work and no play makes Jack a dull boy.The AT4X boasts 35-inch mud-terrain tires, protective skid plates, and a jacked-up suspension with sophisticated spool-valve dampers. The 2024 GMC Sierra 2500HD AT4X and Extreme AEV Edition debut as the most off-road-capable models in the brand's heavy-duty lineup.
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