Is there a list of the CVs for the decoder used on the OnBoard GE 70-ton locomotives? I can't find them anywhere on the Bachmann site.
Have you called Bachmann to ask?
Put the locomotive on an actual program track . You should be able to get a read out of a manufacturers number which is a standard established by the NMRA. The next thing it will tell you is a product ID number. Once you know who made this decoder and what it actually is, you can pursue it in more detail.