The 2015 GMC Sierra 2500HD is a durable and capable full-size pickup entering the third generation. It offers two engine options: a 6.0L V8 gas engine that pumps out 360 horsepower and a more powerful 6.6L Duramax® Turbo-Diesel V8 that delivers 397 horsepower. Both engines are mated to a six-speed automatic transmission with a standard Rear Wheel Drive or optional 4-Wheel Drive. The model is available in four trims — Base, SLE, SLT, and Denali — with varying levels of luxury and equipment. The infotainment system includes an 8-inch touchscreen, Apple CarPlay, and Android Auto. Safety features include traction control, stability control, and front and rear parking sensors. Notably, the 2015 model was a part of Sierra's redesign that increased its hauling and towing capacities.