2020 GMC 3500HD & 5th Wheel Trailer LED Tail Light Flash

[hawgwild]

2020 GMC 3500HD with our 2020 5th Wheel Trailer equipped with  LED lighting connected and the truck off and locked the trailer tail lights blink every 10-15sec.  From reading previous post I've learned that this is a result of the truck/trailer security system.  Not all trailers with LED lights are affected so it appears to be random units.  GM supposedly knows about the issue dating back to 2019 truck models.  I asked my dealer about this "issue" and the service writer said he had never heard of the problem.  He wanted me to leave the truck with them for the day so the dealer tech could call the GM factory techs to see what or if there was a fix.  I declined to leave my truck for something that is easily fixed by just unplugging the 7 pin trailer connection when parked for a long period of time but would still like a permanent fix from GM if there is one.

 

Anyone know of a fix at this time? 

[powerhaulic]

I had it looked at as well, was told every truck they had in stock did it. So naturally they say it is normal.

[hawgwild]

Thanks, I guess we are just going to have to live with it.