These freight haulers sported EMD's 645E3 20-cylinder engine which had 3,600HP output. EMD's SD45s served on the Burlington Northern, Southern Pacific, Santa Fe, Pennsylvania, Great Northern, UP, NP and many other railroads. Today, locomotives are currently preserved at the GN Railway Historical Society, the St Louis Museum of Transportation, the Virginia Museum of Transportation, the Utah State Railroad Museum, the Illinois Railway Museum and the Lake Superior Railroad Museum.