GP20C-ECOs use just enough rebuilt components to designate them a rebuild. The GP20C-ECOs feature a new frame, fuel tank, long hood, and cab with CP providing trucks, prime mover, and alternator (along with many other smaller components), mainly from retired CP GP9s, that are rebuilt and reused in the locomotives. The units resemble a GP60's long hood and feature a snoot nose, which set the cab back slightly on the frame to make room for the additional length. As with the SD30C-ECOs, the GP20C-ECOs have all-LED lighting with the exception of the headlights and ditch lights.
Owners
A total of 130 GP20C-ECOs have been built for Canadian Pacific in three orders. The first order was for 30 locomotives numbered 2200-2229, the second order was for an additional 40 locomotives numbered 2230-2269, and the third order was for an additional 60 locomotives numbered 2270-2329.[2]