Maybe it has air in the system? I know that the old cars ,like in 70s and 80s you could get air in them and do the same thing yours is. It is just a thought.............Scott
It's worth a try........ someone also suggested low coolant but I just had the oil changed before thanksgiving and they are supposed to check all that stuff.. or at least they say they do anyway...
2005 Grand Prix... just standard... no fancy letters on the end. Nothing modified... yet. Maybe in the summer.