M-10002

The Union Pacific Railroad's M-10002 was a diesel-electric streamliner train built in 1936 by Pullman-Standard with a prime mover from the Winton engine division of General Motors Corporation and General Electric generator, control equipment and traction motors. It was the UP's third streamliner, and the last turret-cab streamliner.

It had two power cars, the lead, cab-equipped one fitted with a 1,200 hp (890 kW) V16 Winton 201-A diesel engine and the second equipped with a 900 hp (670 kW) V12 Winton 201-A that had been removed from the M-10001 when it was rebuilt. The two power cars were articulated together with a span bolster, giving them an effective wheel arrangement of B-B+B-B, but they were not articulated with the train and therefore formed the Union Pacific's first separable diesel locomotive.

The train was of nine passenger cars plus the two power cars, making it at eleven cars the longest streamliner trainset yet introduced.

It entered service as the City of Los Angeles on May 15, 1936, the day after the Santa Fe introduced their first non-streamlined diesel-hauled, heavyweight Super Chief on their competing Chicago, Illinois to Los Angeles, California route.