Caption: With its class lights on, CN SD40u 6004 heads west through the Aldershot, Ontario station on the Oakville Subdivision either destined for the Dundas or Grimsby Subdivisions. Behind the remanufactured SD is mix of units that includes another recently rebuilt SD40u and a newly acquired Union Pacific SD40-2 that would be later rebuilt into a CN 5300-series SD40-2 at AMF in Montreal, Quebec.