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Rear window leak

Demon
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DHBWA Enthusiast

DHBWA

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Posted
1 hour ago, AJMBLAZER said:

https://www.amazon.com/Permatex-81730-Flowable-Silicone-Windshield/dp/B000BKEBO0?pd_rd_w=P3uVX&content-id=amzn1.sym.a17b6cb1-9087-4a37-8e73-6d3ca189638a&pf_rd_p=a17b6cb1-9087-4a37-8e73-6d3ca189638a&pf_rd_r=04CX73E11MRJJ3Z9F9PC&pd_rd_wg=fE2Gm&pd_rd_r=de0cc31b-eee8-4d53-b648-18a3b6d5bc0d&pd_rd_i=B000BKEBO0&psc=1&ref_=pd_bap_m_grid_dv_rp_0_32_i

That is what I topped mine with after the best 100% silicone that HD sold

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Rocz3cqg
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Thomcat
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No leaker here so can't do a 100% verification, but the problem seems to be with the spoiler design, regardless of weather the sealer leaks or not, and any cracks in the trim make it worse.  

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DHBWA Enthusiast

DHBWA

Posted
Posted (edited)

I used rope caulking around every penetration on the spoiler and the silicone on top of the window. IMO no need to put any additional sealer along the top edge of the spoiler.

If you seal every penetration it can’t get inside. You could also use rope caulk under the nuts on the inside to double up 

Edited by DHBWA
Big_Kahuna Enthusiast

Big_Kahuna

Posted
Posted

under the nuts on the inside where is this ?

2 hours ago, DHBWA said:

I used rope caulking around every penetration on the spoiler and the silicone on top of the window. IMO no need to put any additional sealer along the top edge of the spoiler.

If you seal every penetration it can’t get inside. You could also use rope caulk under the nuts on the inside to double up 

 

Big_Kahuna Enthusiast

Big_Kahuna

Posted
Posted
1 hour ago, AJMBLAZER said:

I never did. I just sealed up all the access points before that so water can’t get to those screws. 

I will try to do that such a shame GM dont do anything to help the customers out, as much as I love my truck I feel like trading it in and never look back.

AJMBLAZER Enthusiast

AJMBLAZER

Posted
Posted

Eh. It’s a design flaw. They all do it. Ford, Dodge, GM, Toyota, Nissan, et al.

 

I’ve been into GM fullsizes since the 90’s and owned or been around every generation since the 70’s and they all have issues you have to fix or live with. Also owned and been around a bunch of other make trucks and SUV’s and they all have issues.

DHBWA Enthusiast

DHBWA

Posted
Posted (edited)
1 hour ago, AJMBLAZER said:

I never did. I just sealed up all the access points before that so water can’t get to those screws. 

If I wasn’t going to remove the spoiler I would spray out and dry the cavity on top of the window and then buy about six tubes of the Permatex WS flowable sealer and start after it. Probably two layers. I am sure on my two the leaks weren’t coming from the penetrations but the numerous and several large cracks plus on one the lack of sealer on the right side.

This would be pretty easy to try and if successful it’s a twofer….

Leaked fixed and a feeling of accomplishment!

Edited by DHBWA
AJMBLAZER Enthusiast

AJMBLAZER

Posted
Posted

I did two and still had a few slight leaks. I did another and discovered one leak on the driver’s side where the sealant had settled into a slight depression by a crack in the frame. I used the 4th tube and now no leaks. I’ve pretty much filled the space between the glass and the body when viewed from the outside. Between that and sealing the space between the body and the front of the spoiler I believe I’ve stopped the water getting in.

 

 

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