As I mentioned, my truck worked on another trailer and his truck worked with my trailer. So, I think it's specifically a problem between my truck and my trailer. I have ruled out everything else (theoretically).
Just got a 2023 Yukon 3.0L Duramax. I have pulled my enclosed trailer with a 7 pin trailer connector several times and the lights have been fine. The last time I pulled, I got dash errors saying no trailer connected as well as parking light test error. All other lights were fine (brake, R...
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