Last post on Oct 26, 2013 at 6:48 AM
You are in the Pontiac Grand Prix
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Pontiac Grand Prix, Heating / Cooling, Sedan
#37 of 233 Re: Same Problem (Flooded passenger side) [97redgp]
Aug 26, 2005 (12:39 pm)
I am having the same problem with my 1998 Pontiac Grand Prix GTP. Everytime it rains I get a floorboard full of water on the passenger side. I called GM and they told me they have not heard of this problem. Stacy at GM told me that people need to call GM when they have this problem. Please Please Please....if you are having the same problem or had the same problem call GM and complain. The number is 1-800-762-2737. I have even been told that they have been known to fix problems passed warranty. I have had my windshield replaced, sunroof checked, drain tubes blown out, the rain deflector underneath the cowl glued in place and still taking in water. I have replace a A/C fan motor already and this one is starting to squeal. I took a look at it and you could see a water line. So water must be getting into it too. Be prepared....the girl said you really sound frustrated...have you thought about trading your car in for a new one...I could transfer you to a salesperson. I told her I wanted my car fixed. I only have 84,000 miles on it and if I was going to buy a new one I would not be inclined to looking at a GM product. Does this only happen to owners with a sunroof???? I would appreciate all comments!
#38 of 233 Re: Same Problem (Flooded passenger side) [kwebb]
Sep 04, 2005 (5:35 am)
I have a 2000 Grand Prix GT with a similar problem. I notice water on my passenger floorboard sometimes but do not check every rain.
I just finished replacing the fan blower motor for $100 and had manually fixed 2 pieces of broken stripline in the reostat module (used for the 5 fan speeds) to save me the 35 bucks for a new part. The GM engineers designed the fan blower with a rubber hose that comes out of the bell housing to drain any condensation that builds up and the runoff is what drains out to the passenger floorboard. This is a poor design in my opinion. The original fan I pulled out that is five years old is pure rust. I looked deep up under the dash for possible ways for water to come down as I had my winsheid replaced 2 years ago but could not see any water lines.
#39 of 233 Re: Same Problem (Flooded passenger side) [gressjj]
Oct 08, 2005 (4:36 pm)
Just bought a used 1999 grand prix gt with the same leak problem. One day I found 1" high of water in the passenger front rug area after a heavy rain. Later a found out this a problem is apparent in all grand prix cars.
There is a drain tube from the ac/heater that removes the condensation and any excess water as it rains. The tube leads into the engine compartment where the end gets plugged with debris. As the water builds up in the ac/heater, this water runs down the blower motor into the passenger rug. If you do not have water on the rug then the water held in the motor will short it out. In fact, remove the interior panel under the glove box and you may find green mold.
To fix your problem:
You will locate the end of this tube on the fire wall in the engine compartment about 1/3 the way down on the passenger side. Remove the 90 degree rubber elbow, clean it and re-install. Your problem will be gone.
#40 of 233 Re: Same Problem (Flooded passenger side) [pete5147]
Oct 10, 2005 (4:18 pm)
I just found water on the front passenger side today. I have a 2004 GP GTP. Is the tube in the interior of the vehicle or near the engine (under the hood). I need a little guidance in finding it, thanks for your help.
#41 of 233 Re: Same Problem (Flooded passenger side) [kwebb]
Oct 13, 2005 (5:04 am)
I am having the exact same problem with my 2000 Grand Prix GT and I do not have a sunroof. I have also installed a new blower moter and my new one is starting to make noises.
#42 of 233 Re: Same Problem (Flooded passenger side) [robert718]
Oct 16, 2005 (5:56 pm)
the rubber elbow for the drain tube is under the hood on the fire wall on the passenger side 1/3 way down.
#43 of 233 Leak onto passenger front floor from ac/heater
Nov 02, 2005 (1:23 pm)
I have the same problem that many people have had with debris and junk plugging up the drain resulting in a soaked floor and even worse, a soaked foot! It seems as though the problem arises when I use the AC and defrost.
I took of the tube that leads into the engine and it was fine, clear as a whistle. So I tried shoving something up the pipe that the tube connects to and it went in a few inches but then came to a dead stop. What would work, in theory, is to hook up a drill and drill through the debris. The bad thing about that would be that the engine is in the way for any kind of drill.
Is there any way to unplug the debris from the inside? Or would it be possible to drill a hole in the area that it collects in and let it drain out into a bottle or something? Or do you have any other ideas?
#44 of 233 Re: Same Problem (Flooded passenger side) [kwebb]
Apr 26, 2006 (6:03 pm)
Hi Kym, I have a 2004 GP GT and I am experienceing the sm problem, however, I do not have a sunroof, but I have been getting the runn around with the dealership I bought my car from. I bought it used and loved until the leaking started . As a matter of fact I have an appointment in the morning to take my car in for service to attempt to try and fix this problem. Thanks for the phone number, I can not wait to call tomorrow to complain.
#45 of 233 Re: Same Problem (Flooded passenger side) [yellacooki]
May 26, 2006 (9:44 pm)
I am having that same problem with the leaking on my passenger side front and back side. I took it to the dealer and he stated they could fix it for 350.00. He could not explain why or what was leaking or the origin of the problem but he had a price. What the heck!!! What happened with you car. did it cost alot or was it a manufacturer issue. I have a 2004 grand prix gt and it cannot take this leaking water that makes a puddle on my floor. help please.
#46 of 233 Re: Same Problem (Flooded passenger side) [teelove1]
May 31, 2006 (2:59 pm)
It's the same problem of Dirt or Leaves accumulating in the front drainage. The water overflows into the passenger side. Just clean it out but may take some undoing thus chraging $350. You can do this yourself if you have a repair manual.