How Powerful Is the GMC Duramax® Turbo-Diesel Engine?

When the GMC Duramax® turbo-diesel engine is under your command, there’s nothing that can stop you. These engines are so powerful that only models like the 2026 GMC Sierra HD, GMC Sierra 1500, GMC Yukon, and GMC Yukon XL can handle their brawn. If you’re ready to control more horsepower and torque than you ever thought possible, come see the pros at Robertson’s GMC.

The 3.0-Liter Option

The smaller of the two GMC Duramax® turbo-diesel engines is a 3.0-liter option with 305 horsepower and 495 lb-ft of torque. The included Active Thermal Management ensures the engine runs at the ideal temperature for maximum performance, and the 10-speed automatic transmission it’s paired with delivers a smooth and seamless ride. This engine gives the 2026 GMC Yukon a maximum towing capacity of 8,100 lbs and lets the GMC Sierra 1500 tow a jaw-dropping 13,300 lbs.

The 6.6-Liter Engine

Drivers who need to tow incredibly heavy loads are in luck. When the 2026 GMC Sierra HD is equipped with the 6.6-liter Duramax® turbo-diesel V8 engine, the truck offers an astounding 36,000-lb towing capacity. It’s a monster of an engine that roars at up to 470 horsepower and 975 lb-ft of torque. Plus, just in case you need to haul instead of hitch a trailer, don’t worry — you’ll also have a payload capacity of nearly 6,600 lbs.

Experience Relentless Power with the GMC Duramax® Turbo-Diesel Engine

Both of the 2026 GMC Duramax® turbo-diesel engines are incredibly powerful. If you’re looking for a truck or SUV that leaves the competition in the dust when it comes to horsepower, torque, towing capacity, and payload, head over to our GMC dealership in Wareham, MA. We love seeing the looks on our customers’ faces the first time they rev these engines!