2005 Hummer H2 wet driver side floor - Help please!

[Manuel Guizar Jr.]

As the title states I have a 2005 Hummer H2 in which the drivers side front seat floor carpet is becoming wet. I looked up all around and nothing seems to be dripping down the firewall from the engine bay. I thought it might be the A/C is clogged so I hooked up the shopvac to the drainage and nothing came out. It has also been raining and this just started happening so I checked the door seals and they all seem OK.

What would you guys recommend I check next? It's my moms car so if it's something simple I'd like to fix it myself and save her some money.

Thanks


*I did cross post this in two sections not sure if that's against the rules or not!*

 

[Scarsman]

Most likely going to be a plugged drain tube from the sunroof. Open your sunroof and you'll see a tray across the front edge. At each corner of it there is a drain hole. There is a rubber tube runs from this hole across the headliner and down the a-pillars. These tubes get older fairly easily by pine needles, seeds, etc. If you have an air hose set it to pretty low pressure and gently try to blow them out. Just be careful because you don't want to rupture the tube or you'll have to replace it, which would be a royal pain!

When they plug the tray overflows and the water runs across the top of the headliner and down the a-pillars and soaks the carpet.

 

[Big2dabank]

Check roof marker lights first, then sunroof drains


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[Renagade132]

Clean out those sunroof drains brother!

 

[Jeremy]

I had the same problem before. For me it was the A/C drain tube. Just to be sure I would take something to stick inside. I used a wire clothes hanger and it started draining like a gallon of water, I was so happy. You have to be careful not to puncture the tube though.

 

[Renagade132]

Where is the A/C drain tube located Jeremy? And you did this on an H2 or H3?

 

[Jeremy]

Where is the A/C drain tube located Jeremy? And you did this on an H2 or H3?

I did this on an H3 but it's a common problem for most GM made vehicles. Mine is under the hood on the firewall on the passenger side. It's really accessible on the H3. I'm not sure about the H2 though, sounds like it might be on the drivers side if its leaking on the driver floor.

 

[DetroixH2]

So Renegade, did you figure out what the problem was? I actually am having the exact same thing happening but on my passenger side carpet of my H2.
Im a little afraid to poke drains as I do not want to make a bigger problem.
What worked for you?
I am wondering if its the sunroof, my roof lights OR the bad seal of my windshield (that im having replaced this weekend)