1996 Oldsmobile Ciera 6 cyl Two Wheel Drive Automatic 77,000 miles

HI, I HAVE A 1996 OLDSMOBILE CIERA AND ITS LEAKING COOLANT FROM SOMEWHERE BEHIND THE ENGINE. AND I CANT REALLY SEE WHERE ITS COMING FROM BUT SOMETIME I SEE COOLANT SITTING BY THE THERMOSTAT AND REPLACED THAT PART. I WANTED TO KNOW IS IT A BYPASS HOSE BEHIND THE ENGINE SOMEWHERE.

THANKS FOR LISTENING