| Number | Class | Built | Retired | Notes |
|---|---|---|---|---|
| 260:1 | GY-00a | 1978 | HBU-4 hump booster unit (slug),renumbered to 500 in 1990 | |
| 261:1 | GY-00a | 1978 | HBU-4 hump booster unit (slug),renumbered to 501 in 1990 | |
| 262:1 | GY-00a | 1978 | HBU-4 hump booster unit (slug),renumbered to 502 in 1990 | |
| 263:1 | GY-00a | 1978 | HBU-4 hump booster unit (slug),renumbered to 503 in 1990 | |
| 264:1 | GY-00a | 1978 | HBU-4 hump booster unit (slug),renumbered to 504 in 1990 | |
| 264:2 | GY-00m | 1990 | S-3 slug, converted from S-3 switcher 165 second use of this number as a slug usually operates with GP9 72xx series mother | |
| 265:1 | GY-00a | 1978 | HBU-4,hump booster unit (slug),renumbered to 503 in 1990 | |
| 265:2 | GY-00m | 1990 | S-3 slug, converted from S-3 switcher 167 second use of this number as a slug usually operates with GP9 72xx series mother | |
| 266:1 | GY-00a | 1978 | HBU-4,hump booster unit (slug),renumbered to 506 in 1990 | |
| 266:2 | GY-00m | 1990 | S-3 slug, converted from S-3 switcher 351 second use of this number as a slug usually operates with GP9 72xx series mother | |
| 267:1 | GY-00a | 1978 | HBU-4,hump booster unit (slug),renumbered to 507 in 1990 | |
| 267:2 | GY-00m | 1990 | S-3 slug, converted from S-3 switcher 352 second use of this number as a slug usually operates with GP9 72xx series mother | |
| 268:1 | GY-00a | 1978 | HBU-4,hump booster unit (slug),renumbered to 508 in 1990 | |
| 268:2 | GY-00m | 1990 | S-3 slug, converted from S-3 switcher 353 second use of this number as a slug usually operates with GP9 72xx series mother | |
| 269:1 | GY-00a | 1978 | HBU-4,hump booster unit (slug),renumbered to 509 in 1990 | |
| 269:2 | GY-00m | 1990 | 2014 | S-3 slug, converted from S-3 switcher 700 second use of this number as a slug Sold to the New Brunswick Southern (NBSR) |
