Hey guys I would like some opinions on this my friend has a '02 3500 dually six speed with no extras. Tuesday he took the truck in to the local dealer to have a serious lack of power looked at + front brakes. They told him that he needed a hevy duty themostat and that was the prob along with replacing the crank dampner (the seal was torn in a couple spots). $1315 and 3 days later we left. Going down I90 at about 75mph, 5 miles from the dealership he starts waving his hands around for me to pull over we stop and he tells me his temp light pegged out. After much cussing and whatnot we crack the radiator cap and guess what NO WATER/COOLANT!!! What need to know is what all of you guys think about what we should do and if that could have messed up the engine bad or not???