Jeep Grand Cherokee White Smoke

I Have Noticed White Smoke Coming From The Vents While Driving . I Am Not Overheating And No Moisture On The Floor Of The Passenger Side ....

My 1996 Grand Cherokee Laredo Straight 6 4l Was Running At One Point... My Sister Borrowed It Ran It Hot And Left It On The Side The Road...

The Jeep Is Fine While Running. No Smoke Ever Gets Put Out From The Exhaust While Running But When I Happen To Stop For About 3 Minutes Or...