Left side - All 1937-1940 J, K, & L Series trucks, including 1937-1939 Coupe Express.
Left side - All 1941-1948 M-Series trucks.
Left side - All 1949-1956 2R, 3R, E, and 2E trucks.
*NOTE: Will also work on all 1957-64 C-Cab / Transtar trucks, but this latch does NOT have provisions for the key lock cylinder. The mechanism for the lock cylinder could be added from your original latch if needed.
Also fits the following Studebaker passenger car applications:
Left front - All 1937-1946 cars.
Right rear - All 1937-1946 four door cars.