what kind of gauge are you useing (stock or aftermarket) and is it acurate? a friend of mine has a old corvette he said was running hot we checked it with a hand held laser temp gauge and it never ran hotter than 190deg. Im not shure about the history of your truck how long have you had it, but has it run cool in the past? is this a new problem? have you done any hp mods? make shur your gauge is working acurate.