I have a 2006 Silverado 2500HD LBZ and it seems that the fender flares on the rear of the truck are rubbing the paint away in some spots and causing a little bit of rust. Does anyone know if GM makes a "gasket" kit or anything for their fender flares that may fit on the inside or inside/out to prevent this type of thing from happening? Anyone else experience this issue?? Any help or tips on how to fix this would be GREATLY appreciated!! Thanks