My wife car 2004 grand prix is leaking on the passenger side for about 6 months could not find out where it was coming from.Sometimes in florida we get flooded roads maybe water was coming from bottom of car I undercoat it on that side maybe floor plug leaking did not see where water was coming in had that big storm in fl wife car parked leaked in driveway car looked like river inside 13 gallons of water used shop vac 12 gallon an then some of water . Thank you for the information