BNSF GP38AC No. 2116.

(terry cantrell, CC BY-SA 2.0 <>, via Wikimedia Commons)


GM-EMD logo.


An EMD GP38AC is a 4-axle diesel-electric locomotive built by General Motors Electro-Motive Division between February 1970 and December 1971. It was basically a GP38 with an AR10 alternator instead of the GP38's normal generator.

261 examples of this model were built; railroads that purchased this model include CP, DT&I, GTW, GM&O, IC, LV, L&N, N&W, SLSF, SOU and Pacific Power and Light.

Many were upgraded to full GP38-2 status with the Dash 2 modular electrical cabinet.


Burlington Northern EMD GP38AC 2110 at Kansas City, Missouri, February 17, 1981. Photographer: George R Cockle.

No sales were made in the west except to the Frisco, which picked up 30 in a single order which was delivered between

February and April, 1971, SLSF 633-661. This unit is ex SLSF 633, the first one. It survived to become BNSF 2110.

(Craig Garver, Public domain,


Original buyers

Railroad Quantity Road numbers Notes
CP Rail 21 3000-3020
Detroit, Toledo and Ironton Railroad 8 210-217 215 renumbered 209, 216 renumbered 208, 217 renumbered 207; to Grand Trunk Western Railroad 6207-6214
Detroit, Toledo and Ironton Railroad 6 215-220 To Grand Trunk Western Railroad 6215-6220
Grand Trunk Western Railroad 12 5800-5811
Gulf, Mobile and Ohio Railroad 13 721-733 To Illinois Central 9540-9552
Illinois Central Railroad 20 9500-9519
Lehigh Valley Railroad 4 310-313 To Conrail 7656-7659, and then to Norfolk Southern 2881-2884, Rebuilt into remote control yard slugs in 2007.
Louisville and Nashville Railroad 30 4020-4049 To Seaboard System Railroad 6241-6270 then to CSX
Norfolk and Western Railway 60 4100-4159 To Norfolk Southern
Pacific Power & Light Company 1 11 To Arizona Public Service - Pacificorp Cholla Power Plant
Southern Railway 56 2823–2878 To Norfolk Southern.
St. Louis – San Francisco Railway 30 633-662 651 wrecked, remaining to Burlington Northern Railroad 2110-2138 and later to BNSF. Some of them were rebuilt as GP38-3R or GP39-3.
Totals 261

BNSF Railway EMD GP38AC No. 2127 at the Galveston Railroad Museum.

(Michael Barera, CC BY-SA 4.0 <>, via Wikimedia Commons)



In June 2020, BNSF 2127, originally Frisco 650 built in February 1971, was donated to the Galveston Railroad Museum, in Galveston, Texas.



Type and origin
Power type: Diesel-electric
Builder: General Motors Electro-Motive Division (EMD)
Model: GP38AC
Build date: February 1970 - December 1971
Total produced: 261
​• AAR B-B
• UIC Bo'Bo'
Gauge: 4 ft 8+1⁄2 in (1,435 mm) standard gauge
Prime mover: EMD 16-645E
Locale: United States