5459 (GMD serial number A4636) was the last built unit in an order of 60 GMD SD50F built between April 1985 & July 1987. CNR's SD50F locomotives are rated at 3200 hp, 2386 kW (downgraded from 3600 hp, 2684 kW rating at time of production). They are diesel electric weighing 195 tons and ride on 2 3-axle trucks.

SD50F 5459 heads an eastbound freight through Lynden on Monday September 20th, 2004.