| model | builder | build | gauge | | | career |
|---|
| GP40 | EMD, GMD | 1965−1971 (1221) | 1435 | | DE | |
| GP40P | EMD, GMD | 1968−1968 (13) | 1435 | | DL | |
| GP40X | EMD | 1977−1978 (23) | 1435 | | DE | |
| MP20GP | EMD / MPI, Wabtec | 1987−1990 (21) | 1435 | | DL | |
| GP40FH-2 | EMD / Morrison-Knudsen, MPI | 1987−1990 (21) | 1435 | | DL | |
| GP40FH-2M | EMD / Morrison-Knudsen, MPI | 1987−1990 (21) | 1435 | | DL | |
| GP40-3 | EMD, GMD | | 1435 | | DE | |
| GP39H-2 | EMD / Morrison-Knudsen | | 1435 | | DL | |
| GP40P-2 | EMD | | 1435 | | DL | |
| RP40-2C | EMD / Morrison-Knudsen | | 1435 | | DL | |
| GP40PH-2 | EMD, GMD | | 1435 | | DE | |
| GP40WH-2 | EMD | | 1435 | | DE | |
| GP40 Slug | EMD, GMD | | 1435 | | EL | |
| GP40PH-2B | EMD, GMD | | 1435 | | DE | |
