I purchased my 2020, 2500 Duramax in September. I ordered it with the all of the trailering features.
I also ordered an auxiliary camera to attach my travel trailer, which I installed in November.
It worked great for the first two months.
Six weeks ago it stopped working completely.
I tried every combination of plugging and unplugging, cleaning connectors, switching between the interior and exterior jack.
Finally, I removed it from the trailer and took it to a Chevy dealer.
They let me plug it into one of their trucks to see if