is a 4-axle diesel locomotive built by General Motors Electro-Motive Division between April 1972 and December 1986. Power was provided by an EMD 645E3 16- cylinder engine which generated 3000 horsepower (2.2 MW). Standard GP40-2 production totalled 861 units, with 817 built for U.S. railroads, and 44 for Mexican roads. In