The Renfe Class 319 (originally Renfe 1900[note 1]) was a class of mainline medium-high powered diesel electric locomotives built by General Motors Electro-Motive Division and by Macosa (under license) for the state railways of Spain.

In the mid-1960s General Motors won a contract to supply diesel-electric locomotives to Renfe, which was seeking replacements for steam engines.

[2] The American locomotives were Iberian gauge versions of the General Motors Electromotive type G16.

[1] The remaining ninety three of the class were built by Macosa under license; though the locomotives contained the same components the arrangement of the components in the Spanish built versions was different, since the Spanish models were built to a two cab design of more European appearance.

[5] The Spanish built units were numbered 1901 to 1960, 1971 to 1999 and because all the digits of the 1900 class had been expended, 19901 to 19904, the American units were originally numbered 1961 to 1970.