| 1 | A | B | C | D | E | F |
| --- | --- | --- | --- | --- | --- | --- |
| 2 | Great Northern Y-1 - Fleet roster |  |  |  |  |  |
| 3 | ALCO serial | GE serial | Build date | GN No. | PRR No. | Scrap date |
| 4 | 67022 | 10160 | August 1927 | 5010 | 1 | 1966 |
| 5 | 67023 | 10161 | September 1927 | 5011 | — | 1957 |
| 6 | 67542 | 10537 | September 1928 | 5012 | 2 | 1962 |
| 7 | 67543 | 10538 | July 1928 | 5013 | 3 | 1966 |
| 8 | 68272 | 11149 | August 1930 | 5014 | 4 | 1960 |
| 9 | 68273 | 11150 | August 1930 | 5015 | 5 | 1966 |
| 10 | 68274 | 11151 | August 1930 | 5016 | 6 | 1966 |
| 11 | 68275 | 11152 | August 1930 | 5017 | 7 | 1966 |

Question: What GN numbers were assigned to Y-1 units?
Answer: GN numbers 5010–5017 are classified as Y-1 locomotives.