The 2025 GMC Sierra 2500 HD AT4 is a heavy-duty pickup truck manufactured by General Motors. It is part of the Sierra lineup and is known for its off-road capabilities and powerful engine options.
The 2025 Sierra 2500 HD AT4 has several notable features, including a standard 6.6-liter V8 engine that produces 401 horsepower and 464 lb-ft of torque. It also comes with a variety of advanced technology features, such as a 12-inch touchscreen infotainment system, a head-up display, and a 360-degree camera system. Additionally, the AT4 trim level adds off-road-oriented features such as a two-inch suspension lift, all-terrain tires, and a locking rear differential.