HO GEN SDP45 Locomotive GN #331 (ATHG-2004)

HO-scale Great Northern SDP45 diesel locomotive GN 331, a ready-to-run model that faithfully recreates the SDP45 prototype used in passenger service. This detailed locomotive features authentic Great Northern markings and is offered in Legendary Liveries, a curated collection of iconic paint schemes that bring history to life on your layout.

Under the hood, it uses a Genesis driveline with a 5-pole motor, precision flywheels, and a multi-link drivetrain for smooth, quiet performance, with all-wheel drive and electrical pickup across every axle for reliable operation. The model rides on RP25-contour wheels, has body-mounted scale knuckle couplers, fine Celcon handrails, a detailed fuel tank, LED lighting, and a heavy die-cast frame for extra traction. It’s fully assembled and ready-to-run, with a DCC-ready Quick Plug 21-pin interface for easy decoder upgrades. Sound-equipped versions include a SoundTraxx Tsunami2 decoder with dual speakers and full DCC functionality, while basic DC operation remains supported. Minimum radius is 18 inches (22 inches recommended) to ensure smooth operation on most HO layouts.