Green’s Dictionary of Slang

(US) a Studebaker automobile.

1936		Mencken Amer. Lang. (4th edn) 579: The automobile thieves who had their heyday in 1928 or thereabout devised a series of terms of their own to designate cars of the various more popular makes and designs, e.g., [...] B.1. for a Buick, caddy (or golfer) for a Cadillac, ducker for a Dodge, Hudson-pup for an Essex, papa for a Lincoln, spider for a Ford, Studie for a Studebaker, and so on.
1950		Goldin et al. DAUL 214/2: Studie. A Studebaker auto.
1958		E. Gilbert Vice Trap 21: The Ford was turned over [...] and the Studie had rolled a couple of times too.
1970		(con. 1950s) H. Junker ‘The Fifties’ in Eisen Age of Rock 2 (1970) 103: Coming and going in a Studey.
1990		S. Morgan Homeboy 117: I slept in the Studie three months before I opened my first club.