I just discovered that The Duramax is a General Motors V8 diesel engine family
I thought General Motors went out of business
The history of General Motors (GM), one of the world's largest car and truck manufacturers, reaches back more than a century and its actively used in companies all over the world
Didn't GM used to produce the Oldsmobile?
Oldsmobile
Oldsmobile was a brand of American automobiles produced for most of its existence by General Motors. Olds Motor Vehicle Co. was founded by Ransom E. Olds in 1897. It produced over 35 million vehicles, including at least 14 million built at its Lansing, Michigan factory. During its time as a division of General Motors, it slotted in the middle of GM's five divisions (above Pontiac but below Buick), and was noted for its testing of groundbreaking technology and designs, most notably the "Rocket V8" engine
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