The EMD SD45 is a diesel-electric locomotive built by Electro-Motive Division of General Motors from 1966 to 1971. It features a powerful 3,600 horsepower engine and is designed for heavy freight service. The SD45 is known for its distinctive long hood and high nose, which provides better visibility for the crew. This locomotive was popular among various railroads in North America due to its strength and reliability. The SD45 was equipped with a 20-cylinder engine, making it one of the most powerful locomotives of its time. Its design influenced future models in the SD series of locomotives.