Has anyone looked into installing a dc/dc charger to remedy this problem? Something like this.
https://www.amazon.com/Victron-Orion-TR-Isolated-Charger-Supply/dp/B0851TPKV7/ref=psdc_15719911_t2_B07ZKG396Y
It takes an input voltage from the truck, anywhere from 8-17 volts, and gives the appropriate output voltage 10-15 volts depending on your battery bank in the rv.
They are pretty common when installing solar and lithium batteries in RVs. They prevent the higher voltage of the RV battery system back feeding the truck through the 7 pin plug.
I have a 2024 LTZ on order to tow my Airstream travel trailer. I have solar and lithium batteries so hoping this would resolve the problem.