What band did Sedan Delivery writer Neil Young join in 1969?
Sedan Delivery: "Sedan Delivery" is a song written by Neil Young that was first released on his 1979 album with Crazy Horse, "Rust Never Sleeps". Neil Young:  Young had released two solo albums by the time he joined Crosby, Stills & Nash in 1969, in addition to two as a member of Buffalo Springfield.
Crosby, Stills & Nash