The EMD SW1001 is a 1,000-horsepower (750 kW) diesel switcher locomotive built by General Motors' Electro-Motive Division between September 1968 and June 1986.

[1] The SW1001 locomotive type was used in a number of countries outside the USA: in the Americas four units were bought by Canadian businesses; two by Saskatchewan Power and two by the National Harbours Board.

[2] In Africa five were supplied to the Boke project in Guinea in the early 1970s and[2] 18 were acquired by the railways of Morocco (ONCF) in 1982 as type DI 500.

[2] One was acquired in 1980 by Foster Yeoman (vehicle code Y44),[4] and another by Hanson Aggregates in 2000[5] both for use on quarry industrial sites in the England.

[2] Additionally 60 variants with a redesigned cab were built under license as the Renfe Class 310 for the railways of Spain between 1989 and 1991.