I’m not saying that Sloan didn’t do wonders he clearly did what I’m saying is that it’s hard to estimate if without WW2 would he had the opportunity to achieve the same outcome.
“During World War II, GM led the largest commercial-to-military war production effort in American history. In 1942, the company converted all of factories to produce $12 billion worth of airplanes, trucks, tanks, guns, and shells for the US military.”
Before the US got into the war GM supplied a 3rd of the trucks used by the Wehrmacht.