2026 Sierra HD | Heavy-Duty Truck | GMC What is the difference between GMC Sierra 2500 HD 3500 HD? The main difference between the GMC Sierra 2500 HD and Sierra 3500 HD comes down to payload and towing capability Both are heavy-duty trucks built for serious work, but the Sierra 3500 HD is engineered to handle even heavier loads
2026 GMC Sierra 2500HD - MotorTrend Payload ranges widely in the Sierra 2500HD At minimum it can carry 2,822 pounds, in AT4X and AEV configurations Maximum payload for the Sierra 2500HD is 3,863 pounds, available with the RWD
2026 GMC Sierra 2500 Towing Capacity - Truck Report Geeks Gas V8: Around 13–15 mpg combined Duramax Diesel: Up to 17 mpg highway unloaded, dropping under load For long-haul drivers, the diesel’s torque advantage and fuel efficiency under stress make it the go-to choice To compare fuel results with rival HDs, see Car and Driver’s diesel MPG comparison
2026 GMC Sierra 2500HD - JD Power Learn the ins and outs about the new 2026 GMC Sierra 2500HD 4WD Crew Cab 159" AT4X Find information on performance, specs, engine, safety and more