The EMD GP49 is a 4-axle diesel locomotive built by General Motors Electro-Motive Division.

The GP49 is known for its slow acceleration, this was due to the radar unit that is mounted under the front pilot to monitor the actual ground speed when the engine is moving to prevent wheel slip.

It tells the engine's computer to slow the speed of the motors to prevent wheel slip.

In December 2006, the Alaska Railroad auctioned five units (numbers 2801, 2803, 2804, 2806, and 2807) plus parts;[2] Helm Leasing was the winning bidder with a bid of $1.3 million.

[4][5] As of July 2014, units 2803, 2806, and 2807 had been acquired by Frontier Rail and assigned to the new Cincinnati East Terminal Railway in Southwestern Ohio.