i have 2004 with the 4.7 v-8, about a year ago the thermostae stuck and i overheated, had it towed home, flushed the radiator and new collant and thermo, ever since when pulling long hills the light comes on and the temp is pegged, what could it be simple or major? i am at a loss

 

https://dodgeforum.com/forum/dodge-r...s-section.html