I have a 2020 Chevy trail boss and I cannot get the "service trailer Brake" message to stop appearing. That is the only light that is appearing, I have taken it to a dealership and a private shop with no avail. The trailer brake control module has been changed to the updated PN#85073615 with no change. Both shops have inspected the wiring harness with no discrepancies found. All of my trailer lights work but the trailer brakes do not. Any leads or ideas would be helpful. Thank you.