Kevin B

I had the same issue on my 2021 3500 Denali first trip 600mi without any issues. Then, on the return trip the same symptoms occurred as happened to you guys - rewired the trailer first (since it is a 2006 model - naturally assumed it to be the problem, went with Curt 7 blade-style plug and 14awg light wires and 10awg brake wires) without any changes. Found a bent axle when rewiring the trailer, so I replaced both axles and brake assemblies - still had the issues. Finally convinced my local dealer that the issue was in the truck - they replaced the trailer brake module located under the spare tire, and I haven't had any issues since (Over 3000mi later)

I just installed Toyo Open Country AT IIIs on my 2021 Denali 3500 with no suspension modifications except for Air-lift airbags in the rear. No rubbing driving on the road, but only about 1/2" between the inner fender and the tire at full lock in the front - any additional weight or bump in the road at full lock may cause a little rubbing....but who is hitting a bump with the wheel at full lock?

How did you get the invisible camera function to work? What measurements did you put into the trailer setup. My camera does not provide a seamless picture like yours does. It seems like my camera is waayyy more :fish-eyed and there is a huge discrepancy between it and the side-view cameras.