My passenger side on my grand prix is wet and it isnt the heater core its the windshield?

where would the problem most likely be located on the same side or what%26gt;%26gt; how much does it cost to replace front windshield???My passenger side on my grand prix is wet and it isnt the heater core its the windshield?
If the paint was scraped off during a windshield change, it could have a hole rusted through the sheet metal causing the leak.My passenger side on my grand prix is wet and it isnt the heater core its the windshield?
Have you pressure tested the coolant system? Have you been using your ac?
I'd love to know the answer - I have the same problem with my '97 Grand Prix. I was told once that it gets under the seal at the top where the 2 strips on the roof touch the top of the windscreen - but I haven't had a chance to find out for sure.



BTW, you can sometimes just remove the old windshield, clean the old adhesive off and put it back again. It's cheaper, but they won't guaranty that they can get the windscreen out in one piece. It's worth a try (if they can get a replacement quickly if it does break), but be prepared to buy a new screen anyway - just in case. Otherwise, your car will be undrivable until you get a new screen.
You didn't indicate the year of your vehicle but I'll assume it's fairly late-model. Most likely the drain in the bottom of your ';air box'; is plugged. The air box.....or heater plenum ....is the ducting that houses your heater core and allows air to come in the cabin. If the drain is plugged, rain water can back up in the system and leak onto the floor. Take it to a shop and ask them to inspect the drain. They will have to put your car on a lift and look underneath it after determining if that's the problem. Of course a leaking windshield seal is also a possibility. If that's the case it can possibly be resealed without being removed if the leak area can be indentified. If the exact area can not be determined, but it's confirmed to be coming from the windshield, it can be totally removed and and reinstalled with new sealant. Any qualified glass company could do that for you and many will even come to your location to do it. That's your best option if it's the windshield. Having a glass company do it (probably $100-$150) will insure it's done correctly, plus if they break it they should replace it at no extra cost to you. A regular repair shop may or may not honor breakage.
I'm with Nick. My wife's '89 Grand Prix did this on the passenger side. Put the car up on the rack and reach up behind the motor on the firewall just off center to the passenger side, you'll find the drain hole for the A/C condenser housing. Stick your finger in and remove any debris that may be stopping it up.