tomhavingfun
Junior Member
My 2017 Ram 3500 Trademan is running hot when towing a 10,000 pound fifth-wheel or when it is in stop and go traffic. My truck has 77,000 miles on it and runs great, and has the H.O. 6.7 Cummins and runs cool when it isn't towing or in heavy traffic. EGR valve hasn't been serviced , could this be part of the problem?