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Author Topic: Water leak from the body seam seal inside cabin on the back  (Read 352 times)

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Ildar

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I have a water leak inside the cabin from the back seam seal.
As you can see on the photo water is coming from the seal and floor panel start rusting. I have parked my truck front up, but water is still coming and coming.
Does anybody know where this water is coming from?
I have checked midgate and rear window and water is not coming from there. It's coming from behind the seam, but can't see directly where it's from.
I'm planning to replace the seal, but what to solve the problem with coming water. I have cleaned all possible drain holes, but water is still coming.
Please see my photo below
https://www.dropbox.com/s/s4kpyvj25bj2n1q/IMG_6832.JPG?dl=0

Thank you
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2002 Chevy Avalanche 2500 2wd

ygmn

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Re: Water leak from the body seam seal inside cabin on the back
« Reply #1 on: July 12, 2019, 13:57:29 PM »

Look thru this section for the mulititude of places they had water leaks on 2002s.

Some to look at.
Air condition duct box in engine bay seal against firewall.
Door electrical wire boots
Windshield seals.
front body seams where feet are under carpet
Midgate not shut properly with midgate crossbar.
Rear window.
Midgate seal

To name a few
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Ildar

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Re: Water leak from the body seam seal inside cabin on the back
« Reply #2 on: July 12, 2019, 14:05:38 PM »

Thank you for the list of the problems, but I went through the Water Leaks topic and don't have any of these issues.
I found the problem that water is coming through body seam in the back.
Need help to identify why water stays somewhere behind the seam and don't drain out.
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2002 Chevy Avalanche 2500 2wd

ygmn

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Re: Water leak from the body seam seal inside cabin on the back
« Reply #3 on: July 12, 2019, 14:13:02 PM »

that is water ends up... just because it rusts there does not mean it leaks in thru there...

Do you see water come in if you hose underneath?

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Ildar

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Re: Water leak from the body seam seal inside cabin on the back
« Reply #4 on: July 12, 2019, 16:17:49 PM »

The water is coming in from the seam. The photo made with face up and water is still coming in.
If I park it face down it will continuously flow from the hole in the seam.
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2002 Chevy Avalanche 2500 2wd

Randy

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Re: Water leak from the body seam seal inside cabin on the back
« Reply #5 on: July 12, 2019, 16:22:19 PM »

I always recommend picking up the "Avalanche & Escalade EXT Water Management Service Procedures" manual.. It's a great resource for troubleshooting and learning how the water management system is designed to work..

https://www.ebay.com/itm/Avalanche-Escalade-ext-water-management-service-disc-12040-20/153523446251?hash=item23beb5e1eb:g:i8kAAOSwSRdc~-xZ
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Re: Water leak from the body seam seal inside cabin on the back
« Reply #6 on: July 13, 2019, 03:49:05 AM »

if you are saying the seam is leaking then get re-seal the seam...

I do not understand your issue...
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2002 Pewter Z66 - Sept 2001
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Ildar

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Re: Water leak from the body seam seal inside cabin on the back
« Reply #7 on: July 13, 2019, 17:56:33 PM »

The seam is leaking because water is collecting behind the panels, rust out the metal, made hole and now coming in.
If I re-seal it, the water will rust out the metal again and make a hole.
I'm trying to figure out why water is collecting there and not draining out.
I have checked all drain holes and they are all clean.

Trying to find if somebody had the same problem and was able to solve it.
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Randy

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Re: Water leak from the body seam seal inside cabin on the back
« Reply #8 on: July 13, 2019, 21:39:41 PM »

Check this old thread, maybe you have the same problem nd it has rusted through and thats wheret the water is coming from..


http://www.chevyavalanchefanclub.com/cafcna/index.php/board,151/action,display/threadid,24496.html


Good luck
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Re: Water leak from the body seam seal inside cabin on the back
« Reply #9 on: July 14, 2019, 04:31:49 AM »

Check this old thread, maybe you have the same problem nd it has rusted through and thats wheret the water is coming from..


http://www.chevyavalanchefanclub.com/cafcna/index.php/board,151/action,display/threadid,24496.html


Good luck

I remember that one... long time ago...

but here is pic from our albums of some one with similar rust spots....
http://www.chevyavalanchefanclub.com/gallery/displayimage.php?pid=8268#top_display_media

He was using pic to show where he cut for fuel pump access.... but looks similar to yours.

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2002 Pewter Z66 - Sept 2001
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Ildar

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Re: Water leak from the body seam seal inside cabin on the back
« Reply #10 on: July 14, 2019, 07:55:26 AM »

Thank you guy for helping me.
Looks like I have the same problem. Will drill holes to allow the water to go out.
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Ildar

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Re: Water leak from the body seam seal inside cabin on the back
« Reply #11 on: July 14, 2019, 08:28:43 AM »

once I made just a little hole in the underbody I got water draining out.
See photo below

https://www.dropbox.com/s/2y552l86wo4ed1c/InkedIMG_6838_LI.jpg?dl=0

Also I checked 2005 Avalanche and it has those holes from the factory.
It will be a good improvement to all 2002 avalanche trucks to save it from water coming to the cabin.
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