chief4300

when towing my 2020 attutude 5th wheel, the integral brake controller shuts off after about 100 miles and I get an ABS fail and trailer brake fail warning. trailer brakes stop working as does the ABS and cruise control. took to chevy and they say they cant find a problem. took trailer back to mfg and they cant find problem either. checked trailer multiple time and can no faults. any ideas?