2016 6.2 112k near flawless miles,towed a lot ,recently towed 7k over the long haul mountain pass,she got to 240* near the top,cooled down going down the other side.Never did hear the fans roar.The next day I disconnected the tempo sensor to test,the fans revved as they should.Put the HP tuners on it,pids show fans 1,2,3 they show off the whole time logging although they show running 25%
Today I put HP tuners on my 2014 truck,it shows fans 1.2.3 and fan 1 is showing running the entire time.Hoping a guru can help me figure this out,at the point to swapping fan assembly's.Thanks fuse's are good ,no CEL