| Qty. | Road | Numbers | Date | Builder's #s | Phase | Notes |
|---|---|---|---|---|---|---|
| 25 | ATSF | 1100-1124 | 5-7/60 | 25573-25597 | Ia | re# 3100-3124 |
| 50 | ATSF | 1125-1174 | 8-12/61 | 26831-26880 | Ib | re# 3125-3174 |
| 36 | CB&Q | 900-935 | 2-4/61 | 26571-26606 | Ia | to BN 2036-2071 |
| 4 | EMD | 5625-5628 | 8/60 | 26107-26110 | Ia | to SP 7234-7237, re# SP 4084-4087 |
| 12 | GN | 2000-2011 | 4/60 | 25561-25572 | Ia | hi-nose, 1700g fuel tank; to BN same #s |
| 6 | GN | 2012-2017 | 4-5/60 | 25700-25705 | Ia | hi-nose, 1700g fuel tank; to BN same #s |
| 18 | GN | 2018-2035 | 11-12/60 | 26286-26303 | Ia | hi-nose, 1700g fuel tank; to BN same #s |
| 15 | NYC | 6100-6114 | 7-8/61 | 26815-26829 | Ib | no d/b; 6106 wrecked 1965, 6109 wrecked 1963; rest re# 2100-2112; to PC, CR same #s |
| 24 | SP | 7200-7223 | 1-4/62 | 27087-27110 | II | re# 4050-4073 |
| 10 | SP | 7224-7233 | 3-4/62 | 27345-27354 | II | re# 4074-4083 |
| 10 | SSW | 800-809 | 12/60-1/61 | 26304-26313 | Ia | re# 4030-4039 |
| 10 | SSW | 810-819 | 12/61-1/62 | 26943-26952 | Ib | re# 4040-4049 |
| 30 | UP | 700-729 | 7-8/60 | 26045-26074 | Ia | re# 470-499 |
| 6 | WP | 2001-2006 | 11/59 | 25623-25628 | Ia | hi-nose, large headlight casing; 2003 wrecked 1963 |
| 4 | WP | 2007-2010 | 7/60 | 26041-26044 | Ia | hi-nose, large headlight casing |
| Phases: Ia: flared 48" radiator fans, straight side sill. GP20s with 2350g tanks had long air reservoirs mounted under the walkway and inspection holes in the side sill. GP20s with 1700g fuel tanks had short air reservoirs mounted behind the fuel tank, two-stage side sill skirts, and no inspection holes in the side sill. Ib: pan-top radiator fans. II: notched side sill, no inspection holes.
All GP20s built low nose with 2350g fuel tanks and dynamic brakes unless otherwise noted. | ||||||
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