Amongst several dozen units currently being stored in UP's 36th street yard are a pair of sad looking 3GS21B. These units, often known as Gensets, were built by National Railway Equipment. They have three Cummins diesel engines in them and operate with reduced emissions. Due to that, these units are most commonly found (when active) in California. Based on the aftermarket decorations, I would say that's where these units came from as well!
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