GP15-1 i know nickname is old covered wagon or jeep. Is there any other name than this?
P.O.S.
baby tunnel motor is one I have heard
Covered wagon is a nickname for F-units, not hood units. Geep can describe any GP-type locomotive but it’s most common for GP7 and GP9s.
“Baby tunnel motor” sounds about the only real nickname solely for the GP15-1.