Here is an article taken from a recent 100 Years of Chevrolet commemorative issue of Automotive News. It covers John DeLorean's "Chevy" years, after Pontiac, before he left GM, later to start DeLorean Motor Cars.
"As general manager of Chevrolet - then the country's best-selling brand, which sold one of every four cars in America - DeLorean was in many ways the head of the biggest automaker."
