Through the 1970's, the Paducah shops of the Illinois Central rebuilt worn out EMD GP7 & GP9 locomotives into the GP10. The InterMountain Railway Company HO Scale GP10 Locomotive is manufactured with finely molded parts that have been designed to reproduce railroad specific details; such as HORST Air Filter, Horizontal Nose Headlight, Extended Right-front Tool Box, & Engine Access Hatches on the roof.

Non-Sound are equipped with an ESU LokPilot DCC decoder.
Sound units releaed after April 2019 are equipped with an ESU LokSound 5 DCC decoder.
Sound units released prior to April 2019 are equipped with an ESU LokSound Select DCC decoder.
DC only customers may reserve models with a dealer as "DC only". Note that some lighting functions may not operate correctly or at all when a locomotive is converted to DC only.
DC only locomotives are non-sound.