The 6.6 Duramax is one of the most powerful engines for heavy-duty trucks like the Chevy Silverado and GMC Sierra, but how ...

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 ...