Great Northern Railway 2034 at Sioux City, Iowa. The locomotive is a General Motors Electro Motive Division Model GP20. Big Sky Blue paint scheme. Other subject classes: Locomotive, GP20

Great Northern Railway 23 at Sioux City, Iowa in 1969. The locomotive is a General Motors Electro Motive Division Model SW9. Other subject classes: Locomotive, SW-7

Great Northern Railway 33 at Sioux City, Iowa in 1969. The locomotive is an General Motors Electro Motive Division SW1200. Big Sky Blue paint scheme. Other subject classes: Locomotive, SW-9

Great Northern Railway 636 at Sioux City, Iowa. The locomotive is a General Motors Electro Motive Division Model GP-7. Other subject classes: Locomotive, GP-7

Great Northern Railway 649 at Sioux City, Iowa. The locomotive is a General Motors Electro Motive Division Model GP-7. Other subject classes: Locomotive, GP-7

Great Northern Railway Locomotive 189, General Motors Electro Motive Division RS-2 at Sioux City, Iowa in1956., Locomotive