The ANs were built by Clyde under license from GM in 1992 for Australian National for use on Trans-Nullabour Freight and Passenger Duties. They have seen service with AN, National Rail and now Pacific National. These locomotives are used on a number of different duties including ore trains, The Ghan and Indian Pacific duties and East Coast Banking duties. The ANs seen in Queensland are generally coupled between two NRs for banking duties on the East Coast between Melbourne and Brisbane.