The EMD SD24 was a 2,400 hp (1,800 kW) six-axle (C-C) diesel-electric locomotivebuilt by General Motors' Electro-Motive Division of La Grange, Illinois between July 1958 and March 1963.[1] A total of 224 units were built for customers in the United States, comprising 179 regular, cab-equipped locomotives and 45 cabless B units. The latter were built solely for the Union Pacific Railroad.[2]