| Number | Class | Built | Renumbered | Retired | Notes |
|---|---|---|---|---|---|
| 451 | GY-00b | Built new 1980 | renumbered to 205 in 1985 or 1986 | YBU-4m yard booster unit (slug) | |
| 452 | GY-00b | Built new 1980 | renumbered to 206 in 1985 or 1986 | YBU-4m yard booster unit (slug) | |
| 453 | GY-00b | Built new 1980 | renumbered to 207 in 1985 or 1986 | YBU-4m yard booster unit (slug) | |
| 454 | GY-00b | Built new 1980 | renumbered to 523 in1986 | YBU-4m yard booster unit (slug) | |
| 455 | GY-00b | Built new 1980 | renumbered to 208 in 1985 or 1986 | YBU-4m yard booster unit (slug) | |
| 456 | GY-00b | Built new 1980 | renumbered to 209 in 1985 or 1986 | YBU-4m yard booster unit (slug) | |
| 457 | GY-00b | Built new 1980 | renumbered to 204 in 1985 or 1986 | YBU-4m yard booster unit (slug) | |
| 458 | GY-00b | Built new 1980 | renumbered to 200 in 1985 or 1986 | YBU-4m yard booster unit (slug) | |
| 459 | GY-00b | Built new 1980 | renumbered to 201 in 1985 or 1986 | YBU-4m yard booster unit (slug) | |
| 460 | GY-00b | Built new 1980 | renumbered to 202 in 1985 or 1986 | YBU-4m yard booster unit (slug) | |
| 461 | GY-00b | Built new 1980 | renumbered to 524 in 1986 | YBU-4m yard booster unit (slug) | |
| 462 | GY-00b | Built new 1980 | renumbered to 203 in 1985 or 1986 | YBU-4m yard booster unit (slug) | |
| 500 | GY-00a | from 260:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 501 | GY-00a | from 261:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother, sold to New Brunswick Southern | ||
| 502 | GY-00a | from 262:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 503 | GY-00a | from 263:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 504 | GY-00a | from 264:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 505 | GY-00a | from 265:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 506 | GY-00a | from 266:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 507 | GY-00a | from 267:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 508 | GY-00a | from 268:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother sold to New Brunswick Southern | ||
| 509 | GY-00a | from 269:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 510 | GY-00a | from 270:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 511 | GY-00a | from 271:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 512 | GY-00a | from 272:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 513 | GY-00a | from 273:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 514 Photo | GY-00a | from 274:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 515 | GY-00a | from 275:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 516 Photo | GY-00a | from 276:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 517 | GY-00a | from 277:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 518 | GY-00a | from 278:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 519 | GY-00a | from 279:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 520 | GY-00a | from 280:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 521 | GY-00a | from 281:1 in 1990 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | ||
| 522 | GY-00a | from 282:1 in 1990 | March 12 2015 | HBU-4 hump booster unit (slug) usually operates with GP38 75xx series mother | |
| 523 | GY-00c | built new in 1980 | from 454 in 1986 | modified for hump service | |
| 524 | GY-00c | built new in 1980 | from 461 in 1986 | modified for hump service | |
| 525 | GY-00c | built new in 1980 | from 208 in 1989 or 1990 | modified for hump service | |
| 526 | GY-00c | built new in 1980 | from 209 in 1989 or 1990 | modified for hump service |
