I have all chevys/GMC 3/4 trucks. There 2003 thru 2009. My 07.08,09 all blow the fuses when I plug the trailers into them. The 03,04 have no problems at all. We hook up and every light is running. When we hook up to the newer trucks, the fuse blows and all we have is brake and signal lights - no running lights - which ya need at night. Any ideas? All trailers are new within the last two years. LED lighting, ect.