Of the 2,734 GP7's built, 2,620 were for American railroads (including 5 GP7B units built for the Atchison, Topeka and Santa Fe Railway), 112 were built for Canadian railroads, and 2 were built for Mexican railroads. This proved to be more efficient than the car body design as the hood unit cost less to build, was cheaper and easier to maintain, and had much better front and rear visibility for switching. The GP7 was the first EMD road locomotive to use a hood unit design instead of a car-body design. Five GP7B's were built between March and April 1953. The GP7 was offered both with and without control cabs, and those built without control cabs were called a GP7B. Power was provided by an EMD 567B 16- cylinder engine which generated 1,500 horsepower (1,119 kW). The EMD GP7 is a four-axle ( B-B) diesel-electric locomotive built by General Motors Electro-Motive Division and General Motors Diesel between October 1949 and May 1954. OmniTrack 4433 (a GP7 rebuilt by the Chicago and North Western Railway) spotted on CSX in Augusta, Georgia. Some retired, some rebuilt into GP8s or GP10s, many in service
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