The 2021 GMC Sierra 2500HD gains available enhanced trailering technology, including a trailer length indicator and jack-knife alert. GMC's MultiPro configurable tailgate is now standard starting with the SLE trim. Mud terrain tires and a high-clearance entry step are newly optional on the rugged AT4.
First and foremost, the 2015 Sierra 2500HD is a work truck, so GMC offers it in a variety of body styles to fit different jobs. The body options include a regular cab with an eight-foot bed and a double cab or crew cab with a six-foot, six-inch or eight-foot bed. Read more »
The Sierra 2500HD comes standard with a 312 hp 6.0-liter V-8 or an optional 365 hp 6.6-liter turbo-diesel. Both engines are controlled by a six-speed automatic transmission. It can be equipped with an 8-foot cargo box. The Sierra 2500HD is available in regular, extended and crew cab body styles. The exterior also features larger door... Read more »