GMC has introduced its upcoming 2015 Sierra All Terrain HD, which will be available this summer in both 2500HD and 3500HD varieties. All variants of the model will be offered with 4-wheel-drive, and a Duramax turbo-diesel will be an option instead of the 6.0-litre gas engine.
The All Terrain comes standard with 18-inch six-spoke chrome cast aluminum wheels, though 21-inch wheels will come with the 2500HD. The 3500HD version of the truck will have adjustable camper mirror, as well as a chrome cap. Chrome bumpers will be an option, and headlamps are LED.
All models will come with StabilTrak with Trailer Sway Control, and both engine options will come with "enhanced cooling airflow", which aids with keeping full power when hauling large loads. Cruise control is standard, and there will be diesel exhaust braking and auto grade braking for applicable models.
Trims will be offered in SLE and SLT, and technology will have a center position in the model: OnStar with 4G LTE, integrated WiFi hotspot, IntelliLink, Siri Eyes Free for iPhone, and more. There's no information on how much the models will cost, nor when it'll arrive this summer.