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Rear window leak

Demon
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DSW1519 Enthusiast

DSW1519

Posted
Posted
So basically, if you have a sliding rear window, it’s gonna leak. 
I would have to say odds are the slider will leak. I have to agree with the posts above you have to wonder how many trucks are leaking where owners have no clue.

Since finding my leak yesterday everytime I saw a T1 on the road I think "I wonder if that truck leaks too and if so is the owner aware of it?".

I really love my truck but the fact that this issue is still ongoing is completely pathetic.

Sad to think as long as I own this truck and it has a slider every time it rains I will have to check for leaks.

Sent from my Pixel 3a XL using Tapatalk

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Rocz3cqg
Rocz3cqg

Sliding Glass or / and Stop Light Module reported Leaking Situation             Contacts

ShamrockShooter
ShamrockShooter

Well my 2019 early build leaker was replaced with 2020 hopefully not leaker. No signs of an leaks on the window or headliner of the 2020 so fingers crossed. Very impressed with the 10 speed after th

Thomcat
Thomcat

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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BlaineBug Enthusiast

BlaineBug

Posted
Posted

The windshield in my 2019 Yukon also leaked near the top passenger side headliner.  The dealer had a glass company come and they said that the factory urethane was applied improperly.  Then after that, the rain sensor for the windshield wipers didn't work.  But that too was then replaced under warranty.

Jrodpic Enthusiast

Jrodpic

Posted
Posted

Update after sealing the top spoiler gap:

 

Got some rain this weekend.  Truck was out for a few hours. No leak. 
 

Will continue to monitor and report back.

JohnH4260 Enthusiast

JohnH4260

Posted
Posted (edited)
19 minutes ago, Jrodpic said:

Update after sealing the top spoiler gap:

 

Got some rain this weekend.  Truck was out for a few hours. No leak. 
 

Will continue to monitor and report back.

If I buy a 2021 Denali, I’ll probably just seal the top spoiler gap myself using the Kent High-Tech Seam Sealer in Clear, part no. P10200 (5 oz.), as recommended in the GM TSB from January 2020. 
 

https://static.nhtsa.gov/odi/tsbs/2020/MC-10171889-9999.pdf

Edited by JohnH4260
TeamSaris Enthusiast

TeamSaris

Posted
Posted (edited)

Oof. Glad I found this thread. I kinda don't care about having the slider, but I like the truck. Tough one.

Without reading through the entire 179 pages, its confirmed this is still an issue on 2021s correct?

Edited by TeamSaris
Mike_F Enthusiast

Mike_F

Posted
Posted
Quote

Without reading through the entire 179 pages, its confirmed this is still an issue on 2021s correct?

Someone mentioned a few pages back about a new style window  frame, but time has not proven it to be a solution.

 

Rumor has it that GM has now deemed the T1 platform leakage problem to indeed be in the "rocket science" category and have requested help from NASA and JPL.

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JWOutdoors29 Enthusiast

JWOutdoors29

Posted
Posted

Just got the call from the dealership that GM is sending a replacement window to be installed by an independent glass company.  Should be done this afternoon or tomorrow.  I will post which style window it is when I pick it up.  My confidence isn't high that this will resolve the issue for good, but still keeping my fingers crossed.

Mudcon Enthusiast

Mudcon

Posted
Posted

I just had the latest part number glass put in mine yesterday.  The glass has went through 3 part number changes. Took a month and a half for it to come in.  So we will see what happens.

jessebkr87 Enthusiast

jessebkr87

Posted
Posted
13 minutes ago, Mudcon said:

I just had the latest part number glass put in mine yesterday.  The glass has went through 3 part number changes. Took a month and a half for it to come in.  So we will see what happens.

Would you be able to post the part number just to confirm which the latest is?  I read through a bunch of posts and between the different part numbers and the change in the style of plastic I couldn't decipher which was actually the latest.

Transient Senior Enthusiast

Transient

Posted
Posted
DOES anybody with a rear slider have one that hasn't leaked from the factory? 

So far so good. 2020 Trail Boss LT built 6/20 in Mexico.

 

Now that I've said something watch me report back with a leak. First thing first, though. I need some rain. It doesn't rain much in San Diego.

 

Sent from my SM-N960U using Tapatalk

 

 

 

cltsig Enthusiast

cltsig

Posted
Posted

2020 AT4 no leaks yet but hasn't been cold to make the plastic brittle.  I am waiting for the inevitable.  GM is a bunch of incompetent idiots.

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