UP GP20 Locos:
This page is dedicated to the UP's fleet of GP20 units. The WP was the original owner of 30 GP20 units.
Original orders:
| Orig. road numbers | model | EMD serial no. | build date | notes |
| UP 700-729 | GP20 | 26045-26074 | 7-8/1960 |
GP20: UP 700 26045 7/1960 to UP 470 to SECX 2001 to ARZC 2001 to NREX UP 701 26046 7/1960 to UP 471 to SECX 2004 to ARZC 2004 to CLC 700 UP 702 26047 7/1960 to UP 472 to SECX 2006 to ARZC 2003 to TMBL 2003 UP 703 26048 7/1960 to UP 473 UP 704 26049 7/1960 to UP 474 UP 705 26050 7/1960 to UP 475 UP 706 26051 7/1960 to UP 476 UP 707 26052 7/1960 to UP 477 UP 708 26053 7/1960 to UP 478 to PNC in 11/1977 UP 709 26054 7/1960 to UP 479 to SECX 2003 wrecked at Polly, KY UP 710 26055 7/1960 to UP 480 to ITC 2009 to N&W 2009 to NS 2009 to WATX 2009 to TIBR 2009 to WAMX 2002 UP 711 26056 7/1960 to UP 481 UP 712 26057 7/1960 to UP 482 to ITC 2008 to N&W 2008 to NS 2008 to WATX 2008 to WAMX 2001 UP 713 26058 7/1960 to UP 483 to WNTC 483 to WI 438 to SDIY 1438 to M&NA 483 UP 714 26059 7/1960 to UP 484 UP 715 26060 7/1960 to UP 485 scrapped at Omaha, NE 9/1978 UP 716 26061 7/1960 to UP 486 UP 717 26062 7/1960 to UP 487 UP 718 26063 7/1960 to UP 488 to SECX 2002 to ARZC 2002 to NREX 2002 to TMBL 2002 to TMBL 2000 UP 719 26064 7/1960 to UP 489 UP 720 26065 7/1960 to UP 490 UP 721 26066 7/1960 to UP 491 UP 722 26067 7/1960 to UP 492 UP 723 26068 7/1960 to UP 493 UP 724 26069 8/1960 to UP 494 UP 725 26070 8/1960 to UP 495 UP 726 26071 8/1960 to UP 496 UP 727 26072 8/1960 to UP 497 to SECX 2005 to ARZC 2005 to CLC 701 UP 728 26073 8/1960 to UP 498 to SD&AE 103 to KYLE 103 UP 729 26074 8/1960 to UP 499 to Agrico 2010