Dmaxdude

What year is your truck? I have a 2021 HD and am having similar issues. Every time I start the truck it gives me messages on the information center about trailer light errors and thinks a trailer is attached. I took it to the dealer and they said there is not a fix for it yet. I contacted GM directly and they also said they don’t know how to fix it. My truck only has 500 miles and has never had a trailer attached as of yet.