The EMD GP39-2 is a 4-axle diesel locomotive built by General Motors Electro-Motive Division between 1974 and 1984.

The power for this locomotive was provided by a turbocharged 12-cylinder 12-645E3 diesel engine, which could produce 2,300 horsepower (1,720 kW).

Unlike the original GP39, which sold only 23 examples as railroads preferred the reliable non-turbocharged GP38, the GP39-2 was reasonably successful, ascribed to its better fuel economy relative to the GP38-2, which became of more interest in the 1970s energy crisis, and to its better performance at altitude.

[1] The GP39-2 sold to five railroads and two industrial operators:[2] Union Pacific has rebuilt 7 of their GP39-2's into GP39N's at their Jenk's shop.

[3][4] Only one GP39-2 is preserved as of 2019: Media related to EMD GP39-2 locomotives at Wikimedia Commons