The mid-level hauler in the GMC's full-size pickup family, the Sierra 2500HD (shorthand for Heavy Duty) can be equipped like a bare-bones laborer, a luxury yacht and everything in-between. Beneath the skin, however, all 2500HDs are equal: industrial-strength frame, abundant power, beefy transmission and towing capacity up to 17,800 pounds. That's some serious grunt—even in the world of full-size pickups—and only a select few models can handle more.
Although the current Sierra debuted in 2007, GMC trucks have populated farms and construction sites for generations. Perhaps in a nod to its customers' professions, the 2013 model can now run on natural gas in addition to gasoline.