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Starting in 1989, the Grand Trunk Western began a major rebuild project. This project resulted in 36 GP9r's; the only visable difference between the GP9 and the GP9r is these units all have a low front hood.
GT 4600| CN class GR-17d; built 1956 as GT 4443 | |
| Transfered to CV in July, 1963 | |
| Rebuilt in 1989 as GT 4600 |
| CN class GR-17j; built 1957 as GT 4913 | |
| Rebuilt in 1989 as GT 4601 |
| CN class GR-17j; built 1957 as CV 4547 | |
| Rebuilt in 1989 as GT 4602 |
| CN class GR-17b; built 1954 as GT 1755 | |
| Renumbered in 1956 as GT 4431 | |
| Rebuilt in 1989 as GT 4603, class GR-417a |
| CN class GR-17d; built 1956 as GT 4449 | |
| Transfered to CV in July, 1963 | |
| Rebuilt in 1989 as GT 4604 |
| CN class GR-17j; built 1957 as CV 4551 | |
| Rebuilt in 1989 as GT 4605 |
| CN class GRG-17k; built 1957 as GT 4914 | |
| Rebuilt in 1989 as GT 4608, class GR-417a |
| CN class GR-17j; built 1957 as CV 4550 | |
| Rebuilt in 1991 as GT 4607 |
| CN class GR-17j; built 1957 as GT 4556 | |
| Rebuilt in 1990 as GT 4608 |
| CN class GRG-17k; built 1957 as CV 4925 | |
| Rebuilt in 1990 as GT 4609, class GR-417a |
| CN class GR-17e; built 1956 as GT 4904 | |
| Transfered to CV in July, 1963 as CV #4904, class GRG-17e | |
| Transfered to GT October 1977 | |
| Rebuilt in 1990 as GT 4610, class GR-417a |
| CN class GR-17j; built 1957 as GT 4552 | |
| Rebuilt in 1990 as GT 4611 |
| CN class GRG-17k; built 1957 as CV 4923 | |
| Rebuilt in 1990 as GT 4612, class GR-417a |
| CN class GR-17j; built 1957 as GT 4558 | |
| Rebuilt in 1990 as GT 4613 |
| CN class GR-17j; built 1957 as GT 4553 | |
| Rebuilt in 1990 as GT 4614 |
| CN class GR-17j; built 1957 as GT 4555 | |
| Rebuilt in 1990 as GT 4615 |
| CN class GR-17b; built 1954 as GT 1759 | |
| Renumbered in 1956 as GT 4435 | |
| Rebuilt in 1991 as GT 4619, GP9r, class GR-417a |
| CN class GR-17b; built 1954 | |
| Rebuilt in 1991 as GT 4620, GP9r; class GR-417a |
| CN class GR-17j; built 1957 as GT 4540 | |
| Rebuilt in 1991 as GT 4621 |
| CN class GRG-17k; built 1957 as GT 4921 | |
| Rebuilt in 1991 as GT 4622, class GR-417a |
| CN class GR-17j; built 1957 as CV 4549 | |
| Rebuilt in 1991 as GT 4623, class GR-417a |
| CN class GR-17j; built 1957 as GT 4539 | |
| Rebuilt in 1992 as GT 4624 |
| CN class GR-17j; built 1957 as GT 4543 | |
| Rebuilt in 1991 as GT 4625 |
| CN class GR-17b; built 1954 as GT 1761 | |
| Renumbered in 1956 as GT 4437 | |
| Rebuilt in 1992 as GT 4626, GP9r, class GR-417a |
| CN class GR-17j; built 1957 as GT 4906 | |
| Transfered to CV in July, 1963 as CV 4906, class GRG-17e | |
| Transfered to GT October, 1977 as GT 4906, class GR-17e | |
| Rebuilt in 1992 as GT 4627, class GR-417a |
| CN class GRG-17k; built 1957 as GT 4922 | |
| Rebuilt in 1992 as GT 4628, class GR-417a |
| CN class GR-17e; built 1956 as GT 4903 | |
| Transfered to CV in July, 1963 as CV #4903, class GRG-17e | |
| Transfered to GT October, 1977 | |
| Rebuilt in 1992 as GT 4629 |
| CN class GRG-17w; built 1958 as GT 4933 | |
| Rebuilt in 1992 as GT 4630, class GR-417a |
| CN class GRG-17w; built 1958 as GT 4931 | |
| Rebuilt in 1992 as GT 4631, class GR-417a |
| CN class GR-17b; built 1954 as GT 1751 | |
| Renumbered in 1956 to GT 4427 | |
| Rebuilt by GT in 1992 to GT 4632, GP9r, Class GR-417a |
| CN class GR-17e; built 1956 as GT 4902 | |
| Transfered to CV in July, 1963 as CV #4902 class GRG-17e | |
| Transfered to GT October 1977 | |
| Rebuilt in 1992 as GT 4633 |
| CN class GRG-17w; built 1958 as GT 4932 | |
| Rebuilt in 1993 as GT 4634, class GR-417a |
| CN class GR-17c; built 1954 as GT 1767 | |
| Renumbered in 1956 as GT 4901 | |
| Rebuilt in 1993 as GT 4635, class GR-417a |