New looks and interior refinements make the all-new GMC Sierra Heavy Dutys serious contenders for our Truck of the Year competition -- and they feature the most powerful diesels in this class.
Sierra Heavy Dutys also come in a wide range of 2500HD (three-quarter ton) and 3500HD (one-ton) models in WT, SLE, and SLT trim, with three cab styles, three box styles, and five wheelbase lengths for a variety of configuration choices. There's a vast menu of interiors: Base and midlevel trims get a pure pickup theme, while premium interiors borrow the distinctive instrument panel and leather appointments from the Yukon SUV.