Rleg

I have a 2019 Silverado Custom with many of the same issues that I see on here. The backup camera flickers, the radio screen goes black sometimes the radio will still play and sometimes not, The indicator light that tells you if you are in two wheel or four wheel drive works intermittently. The service trailer brake light comes on from time to time and i have never hooked up a trailer to the truck, I have had the steering system fail and give all kinds of messages. The truck only has 4000 miles on it. The dealer cant seem to find the issues since it isn't doing it when it is in their shop. Has anyone got any of these issues fixed at their shop?