The GMC Sierra 2500 is a line of full-size, heavy-duty pickup trucks that were produced by General Motors from 1991 to 2020. The Sierra 2500 was a part of the GMC Sierra family of trucks that was introduced in 1998 and was available with two-door regular cab, extended cab, and four-door crew cab configurations. The Sierra 2500 was available with a range of gas and diesel engines, including the 6.0-liter Vortec V8 gasoline engine and the 6.2-liter Duramax diesel V8. The Sierra 2500 was available in 2WD and 4WD drivetrains, and with various trim packages.