Mike - if the issue is caused by higher voltage feeding into the truck's electrical system, a battery combiner could theoretically be used to separate the 2 systems. Victron has such a device: https://www.victronenergy.com/upload/documents/Datasheet-Argo-Diode-Battery-Combiners-EN.pdf. This solution might be useful for trucks not covered under the TSB but are having the issue regardless.
Mike - if the issue is caused by higher voltage feeding into the truck's electrical system, a battery combiner could theoretically be used to separate the 2 systems. Victron has such a device: https://www.victronenergy.com/upload/documents/Datasheet-Argo-Diode-Battery-Combiners-EN.pdf. This solution might be useful for trucks not covered under the TSB but are having the issue regardless.