20th Sep 2002, 18:07

I also had the leak on the passenger side which I believe I fixed by sealing the firewall under the hood where the connector is with silicon. I did this a year ago and haven't seen a leak since. I have had an ongoing problem with the idiot lights coming on and going out at random. I initially speculated it was the computer, which happens to be mounted just where the leak comes in. I have replaced the computer with a recycled one and get the same effect with the idiot lights. Also, I replaced the electric motor and bent up window guides on my drivers side which seemed to have fixed the problem of the window getting stuck open - until recently where it seems to overheat and get stuck while rolling it up.

30th Sep 2002, 12:31

94 Pontiac Grand AM GT 6cil.

I also have the same problem with the leak on the firewall. I tried to seal it with silicone, but the watter keeps coming - there is also water coming in when its not raining, but my ac is running I think there is another water leak in the condensation of the ac or something like that.

My windows stop rolling up/down. I guess I have to replace the motors, but I don't even want to go there. It's a nice ride when everyhing is great and doesn't rain, but when it does all hell brakes loose.

2nd Nov 2002, 12:37

I own a very nice 96 Grand Am, but have a leak on the passenger side! I guess there have been a few with the same problem! Hopefully somewhere out there, someone found where all this water is coming in, because I haven't yet been able to solve this mystery! Thank you carandtan@aol.com.

11th Dec 2002, 15:10

I also have leaks on my 93 Grand Am SE which come from the fire wall area and one past the passenger side door seal. I've removed all the seats and carpets and sub-padding (a must do or your car will never dry out and will smell forever - I sucked out at least a gallon of water once the padding was removed. Once I got the carpets lose the reek from beneath was quite awesome). I've been driving it now for a few weeks sine carpets. Definite dribble from behind the dash on both passenger and driver side. Can't spot anything from engine compartment. Plan to dig into it further - check back in a week.

I also get a sporadic "check gages" light that I can't figure what is making it come on and occasionally off. I did find a disconnected module behind a drop-down plastic door just to the left of the steering wheel underside of the dash. Plugging the module in caused the cool features of interior lights to function when the door handle on driver or passenger side was lifted. Prior to that the interior lights only came on for the rear doors or dash control switch. Module also controls the idiot lights for the brake fluid level and possibly low coolant level, and automatically locks doors when the car is taken out of Park.

My driver side door will not unlock except via manual mode from inside.

Other than that it is a pretty nice little car.

25th Dec 2002, 23:47

1992 grand am SE

Has a major water leak every time it rains. I attempted to locate the problem and I actually thought I had it. I had some cracks under that black piece of plastic, in-between the windshield and the engine compartment. I sealed them up (there was quite a few and large at that) with a spray on sealant (a tar) and that seams to kill one leak I had.

I had water at the floor from the firewall all the way to underneath the passenger and driver seats. After sealing those cracks the water underneath the drivers side seat left. But there is still water in the front mat on the drivers side. This is after I made sure I sucked all the water out so I would know if the job was done correctly.

I still have water in my car, and I think I may have found the culprit, but I won't be sure until I can get a dry day to pass (funny how it always rains when you have a leak >_<). I am going to check the hinges on the doors, since they both bolt into the same area as the water seems to be coming from, and when it rains it seems like all the water is channeled directly into the hinges for some reason.

Probably not the source since the thread on the thing should be a water tight seal, but you never know what age can do to a car.

9th Mar 2003, 12:43

I also have a leak with a 93 grand am. I put a leaf blower in the car pointing up at the top of the under side dash board (since that is where I see the water dripping from.

I took soapy water in a spray bottle and sprayed the flat area under the hood where the connectors are and lo and behold a bubble forms. The one connector comes out, but what about the one with tape?

Sounds like a stupid GM design to put two connectors on a flat surface.

4th Apr 2003, 13:44

I own a 1996 Grand Am SE that I bought in 1996 with only 30,000 km on it. I also have the water leak that it seems a lot of Grand Am owners have had to put up with. Haven't successfully fixed it yet, but I'll try all of the places you have all mentioned. I have a very important message for everyone. If you have this leak and your "idiot lights" start coming on, be especially careful if your air bags light is on. I was driving along one day and both of my airbags inflated for no apparent reason. I'm in the process of looking into this, but it's believed to be a result of the water leak. Please don't put any children in the front seat if you have air bags, most people know this, but this a perfect example of why they should be in the back seat. Luckily no one was hurt, but I feel people should know about this because it is a safety issue.

11th Aug 2003, 09:50

Yet another Grand Am (SE) with mystery rear passenger-door water leak to floor area. I thought the water was leaking from the window seal; I am SO GLAD to hear about the wheel well and I will check it out as soon as I get the swampwater out of my poor car!

Incidentally - here's my cleanup approach (have tried several things, but this seems to be the best so far) :

1. Spray orange-based cleaner on all mildewy areas (plastic interior trim, door seals, even the upholstery) so you don't get some nasty airborne lung fungus!!!

2. Throw out ANY AND EVERYTHING that may have been in the puddle (s). Have fun washing your hands!

3. Get about a dozen scoops of OxiClean and dump it in the puddle (s) (I did 6 and 6, since water has migrated to other side of rear floor). Stir it with a stick until dissolved. You will be surprised at how that NASTIER than swampwater (I'm from Louisiana; I know!) black death turns into a light gray. No dramatic bubbling or anything, but it's killing something in there for sure.

4. As I write this, the stuff is sitting (has been for about 20 minutes.). I figure I'll check it after a 1/2 hour and then suck it out with the carpet-washer. A wet-dry vac might be better for that first sludge removal.

5. Then, I'm going to wash the carpet with the machine as many times as necessary.

6. THEN, I'm going to do the same with the upholstery.

I'll let you know how it goes...

Robin.