The 6.6 Duramax is one of the most powerful engines for heavy-duty trucks like the Chevy Silverado and GMC Sierra, but how many miles per gallon does it get?

Our friends at PickupTrucks.com have just completed their "HD Hurt Locker" comparison test, in which the GMC Sierra 3500HD ... Sierra also will lead the class in dually payload, with a 7,215 ...

We’re not saying you should autocross the Sierra HD, but compared to older dually ... the Duramax can tow up to 36,000 pounds. The Ram can tow more, but that’s not the whole story. GMC ...

GMC Sierra HD pickups ... Chevy's Silverado HD offerings. A 401-hp 6.6-liter V-8 with a 10-speed automatic serves as the base powertrain, while an available 470-hp Duramax turbo-diesel V-8 with ...

The price of the 2025 GMC Sierra 2500HD / 3500 HD starts at $48,295 and goes up to $94,795 depending on the trim and options. The crew cab with the standard bed remains our Sierra 2500HD ...

Coinciding with the release of GMC's heavy-duty version of their one-ton truck in 2007 (the GMC 3500HD), the GMC Sierra 3500 Classic ... An optional 6.6-liter Duramax turbocharged diesel offered with ...