Hi everyone, I'm new to this site. I own a 1994 cadillac STS. Last Friday I drove my car for a few hours. When I got home my car was fine. However when I woke up in the morning there was Anitfreeze/coolant all over the place in the driveway. So I did some trouble shooting. After refilling the coolant, I let the engine run for a few minutes( with the cap for the coolant off) I realized that the coolant was overflowing. What should I do?