The EMD GP40-2 is a 4-axle diesel-electric locomotive built by General Motors Electro-Motive Division as part of its Dash 2 line between April 1972 and December 1986.

The locomotive's power is provided by an EMD 645E3 16-cylinder engine which generates 3,000 horsepower (2.24 MW).

[citation needed] With the 62:15 gearing (65-70 mph maximum) EMD rated the GP40-2 at 55,400 lb continuous tractive effort.

[citation needed] Union Pacific has rebuilt 129 of their GP40's and GP40-2's into GP40N's at their Jenk's shop.

[4] • Sonora Baja California 2107 is now preserved in a Museum in Mexicali, MX [citation needed]