I have a 2020 traverse AWD high country which I had bought at 24,000mi and now is at 43,400mi. A brief as possible history; after I had the sevice battery charging system message come up, about 2 & 1/2 mo. ago, i had changed the alternator(OEM) and battery(AGM and charging sensor(OEM), the same SCS message came up a couple times in the first couple weeks but then back to running smoothly and stayed good for about a month and a half.

THEN one day i notice , the ACC/ON amber light on the pushbutton/engine start stays on for the whole drive but it does still time out and all things turn off like normal after shutoff/exit. I ALSO notice that same day that the vehicle's outside running lights, or just brake lights would come on about 5min AFTER shutoff and exiting and locked and walked away with fob in pocket.

Five days of doing that, then it changed to the hazards come on, theft deterrent light on dash sometimes will come on(solid red), doors lock/unlock in-unison, quickly and sporadically, horn here and there sporadically(&sometimes horn/headlights very quickly). So the amber colored light still stays on while driving( i dont recall it staying on after green engine/start/on WHILE driving around), and once turned off and away from vehicle, hazards horn and ect. Even if i am inside with fob.

Tried checking fuses with fuse light tester (tester is new and works) but doesnt read A SINGLE fuse, no light on anything besides testing on neg/pos. Sorry for so long a post. If you read it all, thank you very much any help appreciated. I dont have money for an OBDII yet so i have no codes checked yet. Anyone with these same issues? I havent chacked all grounds yet either cause its been extremely windy with warnings and been raining a couple weeks now, but what causes the testet light to not come on on any fuse but works on connections? Also i think maybe BCM for the lights and hazard and tds?