freekie

Just got it back from the dealer. The Trailer Control Module was bad. They replaced it and all is good now.

Thanks. Cant hurt to give it a shot

I checked all the fuses and they all seem fine. 6 to 8 weeks is the less busy dealer . I get the constant 12vdc at the plug but nothing else works.

Warranty is good only there backed up for 6 to 8 weeks

2020 Sierra 2500 HD Denali. 12800 Miles. VIN 1GT49REY8LF257046 No Trailer lights at all. No Power to the 7 Blade connector. When I hook up the trailer and connect the 7-pin adapter to trailing wiring harness, I get no lights, and the Infotainment System shows "No Trailer Detected". I have checked all Fuses under the hood and all are good. I have tested 2 trailers. Both trailers work on a different vehicle but not on this truck. 1 Trailer is Brand new 2022. Truck purchased from Jim Cook Chevrolet 1075 N Main St, Marion, NC 28752 Can you assist me with this issue? Jim