Here is my problem. My truck overheated the other day and the antifreeze level was ok, so I replaced the thermostat. I got it replaced put antifreeze back in it, let it idle for awhile and then drove it around for 15 mins no problem. The next morning I drove off and it over heated again, but the thing is as soon as i vent the coolant tank and start the truck back up it show running normal on the truck and will not overheat again as long as im driving it. Everytime I shut it off and drive it again it repeats this.
I have no clue what to do. Is the new thermostat I put in bad?