The 2025 GMC 2500 AT4 is a heavy-duty pickup truck manufactured by General Motors. It is part of the GMC Sierra lineup and is designed for off-road use. The 2500 AT4 features a number of rugged features, including a lifted suspension, all-terrain tires, and a locking rear differential.
The 2025 GMC 2500 AT4 is powered by a 6.6-liter V8 engine that produces 401 horsepower and 464 lb-ft of torque. It is paired with a six-speed automatic transmission and four-wheel drive. The 2500 AT4 has a maximum towing capacity of 18,500 pounds and a maximum payload capacity of 3,979 pounds.