300guy

Any updates on this issue? Having it on my 2020 2500hd denali. The service dept was not able to resolve the trailer running light problem on there first attemp. They said it does not work with old trailers and told me to buy the 3rd party adapter, which I did and running lights still do not work. The brake, blinkers and back up lights do work, it is only the running lights that don’t work. I have 4 trailers and the running lights do not work on any of them, my trailers are : 2009 horse trailer 2010 dump trailer 2015 travel trailer 2017 boat trailer. All my trailer lights work fine with my other vehicles, 2016 Tahoe, 2018 f-150 and 2009 Duramax. I imagine other owners are getting frustrated that their new 70k truck designed to tow, can not tow. I am ready to install complete old school direct wired lighting harness but really think GM should be resolving this issue as it is pretty ridiculous that oem trailer package does not work with 90% of trailers on road. And not GM bashing , I think the truck is awesome in every other aspect. Pulls like a dream. just need lights!