GE trucks:
AAR-B
FB2
GSC/Adirondack
HiAd bolsterless
Steerable
Boisterless (passenger)
GE has used both the HiAd and their steerable trucks, on their 4400hp models(AC4400CW's, Dash 9's and GEVO's); ie - Canadian Pacific has both truck models(steerable and HiAD), installed on their 4400's.
FB2's(2 axle trucks) - were sometimes used on Dash8-32BWH units(Amtrak), NS Dash8 32B's, Conrail Dash40B's...
Adirondack's (3 axle trucks) were used on Super 7-30C, C30-7's, C36-7's, camelback looking NS C39-8's, Conrail C32-8's, UP Dash 8-40C, BC Rail Dash8-40CM's, Santa Fe Dash8-40CW...
Most pictures I've seen show HiAd's and Steerable's, going to GE's biggest 6 axle's.
That's not to say - they have not been installed, on smaller models?
Rick