I have a problem I changed the radiator, thermostat and it's still overheating I even changed the sensor. When the truck is at idle the temp is good but when I drive it over about 30mph. The temp gauge goes almost to about three quarters of the way and if I go over fifty it goes all the way up please help.

 

Does your cooling fan work? Are you losing coolant anywhere?

 

Yes the fan works I changed the thermostat again today hope this takes care of it.