SilverLTZ71

My issue with my rear leaf springs is the bushings I think. I spray them down with Tri-flow and noise goes away for awhile but comes right back. Unfortunately I don't see any places that have replacement for just the bushings yet. GM parts direct only list the leaf spring assembly with I am assuming bushings installed. I was told by the dealership that if it isn't "broken" warranty can't fix it. I only have 10k miles. My 2011 2500 never had this issue with 60k and towed with it.