Parked at my work Saturday went to leave got SSN and full power accessory errors. Left it over night came back Sunday. Same issues ordered a mongoose and it arrived on Tuesday so started trying to trouble shoot soc on 12 v low so put 2 new batts in today.
Went and bought a large batt charger...
Parked truck now have stop ? safely now and full accessory power active.
FDRS gives these perm error codes in pics
I have replaced both batteries and have on charger while working on system.
FDRS has a APIM update “sync” I can install on usb. Hoping after this I can update gwm a software...