I hooked my snowmobile trailer up to my new ZR 2 for the first time and was immediately greeted with service trailer brake system ! Trailer had lights but NO electric trailer brakes. Took truck to dealer and was told no fix and GM was working on it. Upon further research this is a known issue!!! So I now have a a new truck with 500 miles that I cannot tow with!!! Fantastic!!!! Frustrated to say the least that GM is knowingly selling trucks that have this issue!!!