What song was playing on the radio in James car when he had his fatal accident?

There is no evidence or records indicating that James Dean was listening to the radio at the time of his fatal car accident.

James Dean died in a car crash on September 30, 1955, near Cholame, California. The accident occurred when Dean's Porsche Spyder collided head-on with a Ford sedan driven by Donald Turnupseed. Dean was pronounced dead at the scene at the age of 24.