SP 3877-3886
These are SP low nosed GP9's run through the GRIP program. Only half of the total fleet of twenty units were ever GRIP'd.
SP 3877-3879:
| GRIP number | prev. number | notes |
| SP 3877 | SP 3713 | SP 5877 |
| SP 3878 | SP 3714 | SP 5878 |
| SP 3879 | SP 3726 | SP 5890 |
SP 3880-3886:
| SP 3880 | SP 3720 | SP 5884 |
| SP 3881 | SP 3722 | SP 5886 |
| SP 3882 | SP 3721 | SP 5885 |
| SP 3883 | SP 3724 | SP 5888 |
| SP 3884 | SP 3711 | SP 5875 |
| SP 3885 | SP 3725 | SP 5889 |
| SP 3886 | SP 3716 | SP 5880 |