I'm just over 5k on my 19 3500 Laramie longbed and my service 4WD light came on while I was on the freeway. I don't have a scanner so I can't pull the code. I parked it turned it off. When I turned the truck back on and it was off. Next day at almost the same spot on the freeway it came back on. Same thing turned off the truck turned it back on and it was gone. Today driving through town it came back. Anyone else have an issue with their 4WD yet?