Ground is good. It does it on ever trailer I hook to. With the truck shut off the passenger side running lights and tail lights stay on no matter if the truck running or not. Getting 12v at truck plug 100% of the time .
I drive a 2021 Chevy 2500hd. Having an issue with trailer lights staying on. Is there a trailer light control module on my truck? The dealership is telling me no. But everything else I see online it says there is one. Does anyone know which module controls the trailer lights on this truck? Vin 1GB1YLE73MF171983