In 1949, EMD introduced the GP7. The basic design followed most diesel switchers with the addition of a short hood instead of an end-cab. The hoods were also full height to better accommodate the diesel engine and mechanical and electrical components. In 1954 EMD upgraded the GP7 to become the 1,750 horsepower GP9. Externally, the first GP9s were virtually unchanged from the last GP7s. Later versions would include different louver arrangements and the last ones would come without the frame skirting. The GP9 was available with all of the fuel tank, steam generator, and dynamic brake options as the GP7, including torpedo tube air tanks, mounted on the roof.

NEW FEATURES:

• All-new LED lighting
• Rubber MU hoses for durability

SP FEATURES:

• Accurate inertial and radiator grille position on long hood
• Early coupler cut bar
• Low MU stand
• Full skirts above the fuel tank
• MU catch boxes with footboards
• SP Light package front and rear, effect with DCC+Sound
• Non-operational red emergency lights at each end
• Front and rear early Pyle headlight
• Dynamic brake
• Nathan P3 horn - not depicted