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Re: Water sound inside 2004 grand prix
This sound you hear is your cooant going to your heater core. Check your coolant level , radiator cap and thermostat. one of these mught be on its way out. If you have no problems with your heat or a/c then flush your radiator and don,t worry about anything. I hope this helps. Don,t forget to rate my answer, thanks
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On the early 2000 model Grand Prix the issue with the water leaking into the passenger floor board is usually the seal that has come off near the blower motor, this seal is easily able to be replaced and is inexpensive right from GM. You can remove you wiper blades and the plastic coweling in front of the widshield then look down inside where the intake is for this blower motor and you should see the seal just laying there or maybe hanging off. The purpose of this seal is to divert rain water that runs down the windshield and into this intake area. Replace this seal and it should take care of the issue.
If this isn't the issue some of these cars had an issue with the windshield not having enough adheasive installed on the lower portion of the windshield and allowing rain water to be driven in between the window and the dash, the water then runs down the firewall behind the dash and corrodes wiring. A friend of mine had this issue on his pontiac and had to had the entire ECM wiring replaced and the window resealed.
check for hole in floor if not problem run hose on car while seeing where water is entering. if nothing leeking with hose see if water is comeing from your heater box (passenger front under dash)and the liqued in car is anti freeze if so replace heator core.
Your AC drain is clogged. If you look near the floor under the dash on the passenger side you will find a small rubber hose that goes thru the floor board. Take the hose off and clean it out. You will find that it is clogged with dirt. Once it is cleaned out hook it back up under the dash. You will notice that if the car is running with the AC on, you will be able to see water dripping on the passenger side under the car that will mean you cleaned the hose out and it is working.
If leaking coolant under dash on passenger side floor broad it's your heater core. Call's for 2.8 labor flat time to remove heater core, in some case's you'll have to recover, evacuate and recharge your A/C system to remove your heater core.Sit under dash on passenger side.
The only possible source of the sound would be the coolant moving inside the heater core inside your dash. You may want to check the level of the water/coolant in the radiator & the coolant reservoir. Likewise to check would be the connection points leading to the heater core on the firewall in the engine compartment.