Explore the 2026 GMC Sierra HD AT4 and AT4X off-road work truck equipped with off-road suspension with twin-tube shocks, prograde trailering tech, and more.

Test drive Used GMC Sierra 2500 AT4 at home from the top dealers in your area. Search from 1612 Used GMC Sierra 2500 cars for sale, including a 2020 GMC Sierra 2500 AT4, a 2021 GMC Sierra …

3 days ago · Get KBB Fair Purchase Price, MSRP, and dealer invoice price for the 2025 GMC Sierra 2500 HD Crew Cab AT4. View local inventory and get a quote from a dealer in your area.

2 days ago · The 2025 GMC Sierra 2500 AT4 features a 6 inch McGaughys lift kit, 20x9 Weld wheels, and 37 inch Nitto tires, creating a bold stance and improved off-road capability #GMC2500AT4 …

View detailed specs, features and options for the 2025 GMC Sierra 2500HD 4WD Crew Cab 159" AT4 at U.S. News & World Report.

The 2025 GMC Sierra 2500HD 4WD Crew Cab Long Bed AT4 comes equipped with a gasoline powered engine that produces 470 hp @ 2800 rpm and four-wheel drive. The Sierra 2500HD includes safety …

Jun 10, 2025 · GMC first dipped its toes into the factory off-road space with the introduction of the 2019 Sierra AT4. A cautious step, the inaugural AT4 focused on the usual suspects: tires, suspension, and …

Learn the ins and outs about the new 2025 GMC Sierra 2500HD 4WD Crew Cab 172" AT4. Find information on performance, specs, engine, safety and more.

Save up to $7,783 on one of 1,880 used GMC Sierra 2500HD AT4s near you. Find your perfect car with Edmunds expert reviews, car comparisons, and pricing tools.

Jun 12, 2025 · Read on for a breakdown of the 2025 GMC Sierra 2500 AT4 vs AT4X—and when you’re ready, contact our team or visit us to see these powerful pickups in person.