GECX 4000-4009 were built as demonstrator units. The units have been have been sold to Union Pacific. They have since been re-numbered as 7000-7009.
HO GEN AC4400CW Locomotive w/DCC & SOUND, GECX #4002 Video Overview
GECX 4000-4009 were built as demonstrator units. The units have been have been sold to Union Pacific. They have since been re-numbered as 7000-7009.