interior water leak. Cowl?

[04silverprix]

We have a 2004 Grand Prix. On a recent trip to Kansas City from Omaha we experienced a down pour. I noticed some water on the front passenger floor. My wife thought the water may have been from her umbrella.

Today my wife reported a large amount of water on the passenger floor after she got home from work. It didn't rain today and the water didn't contain any anti freeze.

My first thought was a clogged passage to the condensation route. Maybe the condensation from the A/C ran on the floor instead of the driveway.

Then I saw a similar post about interior water passing past the cowl where the cabin filter resides. And there is a replacement cowl water panel that is an improved design from the original. Then I noticed this panel was applicable to earlier models.

Is there a cowl panel leak issue with 2004-08 GPs? Is there an improved cowl panel for these cars, or is the problem corrected by replacing the panel after it is 10 years old?

Any input is appreciated.

[Slick2500]

Idk if the 04+ cars have the cowl panel leak issue or not. I would check the a/c tube those can get plugged up, and I would lean towards that as the second time it happened it wasn't raining.

[Scottydoggs]

follow this thread to open up the cowl to see if its the problem. http://www.grandprixforums.net/threa...ass+side+floor

[Madness]

^^^^this!!

It is like $5 from the dealer, but don't expect the dealer to know what it is. Just give them the part number and tell them to order it after you confirm the price.

[duane9586]

Does it have a sunroof? If so check the drain tubes


Sent from your moms back seat!

[04silverprix]

I discovered the issue. Upon removing the cowl cover I discovered the cowl seal was off. It leaked so bad that the cabin filter was blue from windshield washer fluid leaking in.

I went ahead and got the cowl gutter from the local GM dealer. It went right on without modification. I think since this item is so inexpensive, it is a good idea to go ahead and get one. It appears to shroud the blower motor/cabin filter cavity quite well.