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A new upper echelon for GMC work duty toughness, the 2015 Sierra 3500HD boasts a high maximum towing weight amount and up to 23,200 pounds in fifth wheel trailing capacity thanks to torquey gasoline and turbo-diesel powerplants. Learn more.See All Model Years
GMC entered 2015 with the redesign of the GMC Sierra 2500HD and the Sierra 3500HD (both featuring a brand-new new double-cab body style), as well as a redesigned Canyon and Yukon, adding more engine power, improved fuel economy and more standard features to both models. Meanwhile, the Terrain got rolling Wi-Fi, while the 1500HD was eliminated from the Sierra lineup altogether.