SOU GP39X:
This page is dedicated to SOU's small fleet of GP39X roadswitchers. The SOU was the original owner of 6 GP39X units, all built with high short hoods. They were sent back to EMD and rebuilt into GP49's.
Original orders:
| Orig. road numbers | model | EMD serial no. | build date | notes |
| SOU 4600-4605 | GP39X | 786284-1 thru 786284-6 | 11/1980 | rebuilt to GP49 |
GP39X/GP49: SOU 4600 786284-1 11/1980 to NS 4600 SOU 4601 786284-2 11/1980 to NS 4601 SOU 4602 786284-3 11/1980 to NS 4602 SOU 4603 786284-4 11/1980 to NS 4603 SOU 4604 786284-5 11/1980 to NS 4604 SOU 4605 786284-6 11/1980 to NS 4605