Athearn Genesis HO GEN GP38-2 Locomotive, UP 'GP38N' #726

Union Pacific’s GP38N locomotives are modernized versions of the EMD GP38-2, rebuilt with computerized control systems, microprocessor-based electronics, and other reliability upgrades. Rather than being newly constructed, these locomotives originated primarily from GP38-2s inherited through predecessor railroads that became part of the Union Pacific system. Many were acquired through the railroad’s major mergers with the Missouri Pacific (MP), Denver & Rio Grande Western (D&RGW), and Southern Pacific (SP). The “N” designation identifies locomotives that have been modernized with contemporary electronic control systems and other technological improvements while retaining their original 2,000-horsepower EMD 645 diesel engine and proven mechanical components. These upgrades enhance reliability, diagnostics, and operating efficiency, extending the service life of the locomotives. Today, Union Pacific GP38N locomotives are assigned primarily to yard switching, transfer service, local freight operations, and other duties where dependable low-speed performance is more important than high-speed mainline operation. Their combination of proven GP38-2 design and modern technology makes them valuable workhorses across Union Pacific’s network.