2018 Silverado Electrical issues/Shutting down

[CCCLODS]

2018 Silverado ltz 6.2 90k 

I’ve recently been having an issue more and more lately with my dash lights and radio turning off I get a stabiltrack warning on the dashboard, steering gets tough and recently it’s shut off on me 2 times now when this is all happening, I can put it in neutral and it starts right back up, but this is concerning. I have read about the grounding issues and I am going to remove the negative ground cable on the battery and clean all the spots that connects then hook it back up. I saw a lot of people just replace it altogether. I opened the fuse block that sits on top of the battery and it looks clean in there. Is the g218 ground still an issue on the 2018’s? I saw a service bulletin on that as well, but didn’t think it included 2018. The battery is original, but I had it tested at two different auto stores in both tested good. Never any starting issues at all. 

[BO TIE 1]

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