Had the lines replaced on my 2019 6.2L after finding oil leaking. Drove the truck for a week and noticed still smelled oil burning and seeing more oil leaking. Dealer told me that the rear main failed. I am not at all happy with the quality of this truck. Between the 2 repairs I am out more than $4,000.
My 2019 Silverado has had the same issue, it usually pops up during cool damp weather and clears up after i have driven the truck awhile. I mentioned it to the dealer where i have had all my service / oil changes done and I was told that GM is aware of it and there would be an update sent to me truck. I haven't noticed if any updates were done but now that fall weather is here, I started seeing that same issue pop up again.
I wired battery 12 volt to a relay that switched from light circuit. Relay squeezed into the maker light hole just above the camera. Put on 2000 miles this summer without any issues. Total time spent was an hour.
I am having the same issues with my Furrion camera on my 2019 Silverado. The problem is the Silverado uses a PWM signal on the trailer light circuit and it interferes with the camera. Furrion is aware of the issue and supposedly working on a fix.