Cadillac Repair: losing coolant, losing coolant, radiator cap

Question
Hi, my 95 caddy sts, twice over the past month or so has been losing most or all of it's coolant as soon as I turn the car off,(usually when it's been hot out.)There are no signs of overheating, the gauges are reading normal temp.It seems the coolant just gushes out under the car when the engine is turned off.I fill it back up and it doesn't leak until....?

Answer
In the engine compartment there should be a plastic OVERFLOW jug that has a rubber hose that connects to the radiatir just below the radiator cap and goes to this overflow jug Make sure that this overflow jug is only filled to the FULL MARK as indicated on the jug when the engine is at idle speed at normal operating temperature.