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Hi, I am Mike, welcome. I'm reviewing your question.
What happens if you switch the tow mode off? And then back on?
I just got done reading when the tow/haul switch is on, the transmission isn't supposed to shift into overdrive. Anyhow, I believe the next best step is to have the trouble codes retrieved from all of those modules.
I had like 87 results when searching for codes referring to tow, so unless I know the specific code, I have nowhere to start.