So latly my 2004 Grand Prix GTP(competition group) has been over heating everytime i go anywhere. I open up the hood and the coolant is all gone or there is little left. I will wait for it to cool down then add more then go home and by the time i get home all of the coolant is gone again. This has been happening for some time now and i have no idea what is wrong with it. I checked the tubes and the bottle to see if there were leaks and there were not any. Also when I leave the car in the driveway for 6 hours after filling it up with coolant again it is almost all gone when I come back out. I think it is something within the engine but what could it be? I need help soon.
