2,000 Horsepower -- Built 1967-1979 by EMD - LaGrange, Illinois
Existing Roster
| 4600 | 4601 | 4602 | 4603 | 4604 | 4605 | 4606 | 4607 | 4608 | 4609 |
| 4610 | 4611 | 4612 | 4613 | 4614 | 4615 | 4616 | 4617 | 4618 | 4619 |
| 4620 | 4621 | 4622 | 4623 | 4624 | 4625 | 4626 | 4627 | 4628 | 4629 |
| 4630 | 4631 | 4632 | 4633 | 4634 | |||||
| 4701 | 4702 | 4703 | 4704 | 4705 | 4706 | 4707 | 4708 | 4709 | |
| 4710 | 4711 |
Union Pacific's GP38-2 Renumbering Plan
| CNW No. | 1st UP No. | 2nd UP No. | CNW No. | 1st UP No. | 2nd UP No. | |
| 4600 | 365 | 4631 | 396 | |||
| 4601 | 1866 | 366 | 4632 | 397 | ||
| 4602 | 367 | 4633 | 398 | |||
| 4603 | 368 | 4634 | 399 | |||
| 4604 | 369 | |||||
| 4605 | 370 | 4701 | 2070 | 400 | ||
| 4606 | 371 | 4702 | 401 | |||
| 4607 | 372 | 4703 | 402 | |||
| 4608 | 373 | 4704 | 403 | |||
| 4609 | 374 | 4705 | 404 | |||
| 4610 | 375 | 4706 | 405 | |||
| 4611 | 376 | 4707 | 406 | |||
| 4626 | 391 | 4708 | 407 | |||
| 4627 | 392 | 4709 | 408 | |||
| 4628 | 393 | 4710 | 409 | |||
| 4629 | 394 | 4711 | 849 | |||
| 4630 | 395 |