These GP-35 powered locomotives are painted blue with yellow side rails, lettering and logos. They were built in 1964 (B&O) and 1974 (C&O) by the Electro-Motive Division of General Motors. The EMD GP-35 is a 4-axle diesel locomotive built by General Motors Electro-Motive Division between July 1963 and January 1966. Power was provided by an EMD 567D3A 16-cylinder engine which generated 2500 horsepower.