I just discovered that The Duramax is a General Motors V8 diesel engine family
I thought General Motors went out of business
History of General Motors
The history of General Motors (GM), one of the world's largest car and truck manufacturers, dates to more than a century and involves a vast scope of industrial activity around the world, mostly focused on motorized transportation and the engineering and manufacturing that make it possible. Founded in 1908 as a holding company in Flint, Michigan, as of 2012 it employs approximately 209,000 people around the world. With global headquarters at the Renaissance Center in Detroit, Michigan, United States, General Motors manufactures
Detroit Diesel V8 engine
General Motors introduced a line of Diesel V8 engines for their C/K pickup trucks in 1982. This engine family was produced by GM through 2000, when it was replaced by the new Duramax line. AM General's subsidiary General Engine Products (GEP) still produces a military variant of this engine for the HMMWV.
The General Motors light-truck 6.2 and 6.5 L Diesel engines were optional in all 1982 through 2000 full-size GM pickups, SUVs, and vans: Chevrolet C