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GWWR 2037 EMD GP38.jpg
EMD GP38 of the Gateway Western Railway
Type and origin
Power typeDiesel-electric
BuilderGeneral Motors Electro-Motive Division (GM-EMD)
General Motors Diesel (GMD)
Build dateJanuary 1966 – December 1971
Total produced706
 • UICBo'Bo'
Gauge4 ft 8 12 in (1,435 mm)
Fuel capacity2,600 US gal (9,800 l; 2,200 imp gal)
Prime moverEMD 16-645
AspirationRoots type supercharger
Performance figures
Power output2,000 hp (1.49 MW)
LocaleNorth America

The EMD GP38 is a 4-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division between January 1966 and December 1971. The locomotive's prime mover was an EMD 645 16-cylinder engine that generated 2,000 horsepower (1.49 MW).

The company built 706 GP38s for North American railroads.

In 1972, EMD began making an updated model, the GP38-2.


A number of GP38s have been rebuilt into the equivalent of a GP38-2.

Conversely, a number of higher horsepower 40 Series locomotives have been rebuilt into the equivalent of a GP38-2 (GP38AC), by the removal of the turbocharger and the substitution of twin Roots blowers.

In 2007, Norfolk Southern rebuilt a 1969 GP38 into an experimental electric locomotive dubbed the Altoona Works BP4.

See also[edit]


  • Marre, Louis A. & Pinkepank, Jerry A. (1989). The Contemporary Diesel Spotter's Guide. Waukesha, WI: Kalmbach Books. ISBN 0-89024-088-4. LCCN 88083625. OCLC 19959644.
  • Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, Wisconsin: Kalmbach Publishing. ISBN 978-0-89024-026-7.
  • Sarberenyi, Robert. EMD GP38 and GP38AC Original Owners
  • Norfolk Southern 2014 Sustainability Report [1]

External links[edit]

Media related to EMD GP38 locomotives at Wikimedia Commons