Hy jay 1124, the first 2 stroke diesel produced by General Motors was manufactured in 1938, they did not become "Detroit Diesels" until 1965. I believe that diesel engines were offered in the largest GMCs in the 1946 model year. You'll have to be more specific with your question about Chevrolet diesel powered trucks, do you mean Detroit Diesel power, or any diesel engine? The 8V71 Detroit Diesel engine was offered in the 1960 model year, the engine was 568 cubic inches, 8 cylinders times 71 cubic inches. Chevrolet started offering Detroit Diesel engines in the mid 60s when they started matching GMC model for model, hope that helps.
