Mark Gilkes

Thanks for the reply. I have a small utility trailer and everything works fine with that. As soon as I turn my headlights from "auto" to "on" in the truck the running lights on the brand new camping trailer work fine. Yes, it has a light testing cycle and I get no errors from that.

Good morning. I have a brand new 2022 Rockwood trailer and I get no running lights (no power to my backup camera either) when I hook up my 2019 AT4. If I manually turn on the head lights, the running lights now will work. Sounds like I need to go to the dealer with this issue and get nowhere like the rest you, right?

Greetings, I have a GMC AT4 with 28K miles on it. I noticed a pulsating in the brakes under load when driving downhill from the mountains here in Colorado around 18K miles or so. I don't pull anything heavy, just normal expressway driving. It got so bad when coming down from the mountains a month ago that I finally took it into my dealer here in Denver. They have diagnosed the problem as both front rotors are warped and need to be replaced, which they say is not covered under my 36K mile bumper to bumper warranty. Any recommendations before I go off on them?