LOCOMOTIVE PROFILE

EMD GP9

A 1,750-horsepower four-axle road-switcher that became one of the classic first-generation diesel locomotives.

EMD GP9 at a glance

BuilderGeneral Motors EMD / GMD
Power1,750 hp
Prime moverEMD 16-567C
Wheel arrangementB-B
Axles4 powered axles
Production era1954–1963
LengthAbout 56 ft
Typical roleRoad-switching, local freight, branch-line and later short-line service

A diesel-era workhorse

The GP9 followed EMD's successful GP7 and gave railroads a versatile locomotive that could handle road freight, local work and switching.

How to identify it

A GP9 has two two-axle Blomberg-style trucks and the long-hood/short-hood layout of EMD's early GP road-switchers. Rebuilds and chopped noses can make identification difficult.

What GP means

GP stands for General Purpose. Unlike streamlined F units, GP locomotives were designed for visibility and access that made them practical for both road and switching assignments.

Why so many lasted

The simple 567-series engine and practical four-axle layout made GP9s attractive candidates for rebuilding. Some remained in industrial, regional or tourist service decades after construction.

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