2024 GMC Sierra 2500HD AT4

The 2024 GMC Sierra 2500HD is a heavy-duty pickup built for serious towing and hauling, with a focus on comfort and technology that rivals the Ford Super Duty and Ram 2500. The Sierra 2500HD drives with the confidence of a true workhorse, and its steering feels direct for a truck this size. Inside, the cabin offers generous space and available upscale materials, with a user-friendly infotainment system and plenty of storage. With multiple cab and bed configurations, the Sierra 2500HD can be tailored to fit a variety of work and personal needs. Off-road suspension with twin-tube Rancho shocks and an auto-locking rear differential set the AT4 apart from the SLT and Denali trims. Its standard 6.6L V8 makes 401 horsepower and 464 lb-ft of torque, paired with a ten-speed automatic and four-wheel drive for confident towing and trail driving. The AT4 comes standard with the HD Surround Vision multi-camera system and trailer-side blind-zone alert, making hitching and reversing easier.