The GMD GMD1 is a diesel locomotive originally produced by General Motors Diesel (GMD), the Canadian subsidiary of General Motors Electro-Motive Division, between August 1958 and April 1960.

This road switcher locomotive is powered by a 12-cylinder EMD 567C diesel engine, capable of producing 1,200 horsepower (890 kW).

One hundred and one were built, Canadian National (CN) purchased 96 and Northern Alberta Railways (NAR) the remaining five, which later became part of CN's fleet when they acquired majority interest in NAR.

[1] As the light branches were abandoned or rehabilitated, the bulk were upgraded with new fuel tanks and Flexicoil B-B trucks and assigned to yard and transfer service.

[3] A number of GMD1 units were sold off in the 1990s and 2000s to rebuilders, leasers, regional and shortline railways.