2013 yukon : fuse for left side lights will blow every 3 days or so. IF I remove the taillight harness all is fine. reconnect tailight harness and remove licence plate harness .. all is fine. Seems like too much load ? dealer went through all wireing but I dont think its a bad wire. Maybe short in ECM ?

realize a bad wire can work fine UNTIL it gets a big load, then it blows a fuse from heat creation. I'd look for damaged wiring and corroded connections and sockets first