The Sierra 3500 was a one-ton variant of the 2nd Gen GMC Sierra that debuted for the 2001 model year. These trucks were available in standard, extended, and crew cab comparments, with short or long beds. A few gasoline powered V8 options were available for engines, as well as a Duramax diesel. Both rear and all wheel drive versions were available, with dual rear wheel axles also offered. Production of the 2nd Gen Sierra 3500 ended in 2007, when the next generation 3rd Gen GMC Sierra was introduced.