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Leaking rear window

redpat2061
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redpat2061 New Member

redpat2061

Posted
Posted (edited)

Hey guys I have seen leaking rear window or third brake light alluded to in a few places but not much specific information about this. Just that it's a known issue. 

 

Can anyone tell me anything specific about where the leak might be located? My dealership took 8 days to re-seal the brake light according to some service bulletin, but evidently did not test it because the first time it rained after I got it back, water was coming in to the cab in exactly the same place. 

 

My poor truck has now spent more time in service than my driveway. 

 

Anything you guys can tell me would be appreciated. My service people need help. 

20200924_140027.jpg

Edited by redpat2061
  • 2 weeks later...
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Pryme
Pryme

It seems some of these truck’s issues stem from the upper end options. Not to make light of any problems but that is a big reason I went with a WT(and because I’m cheap) it has a solid rear window(at

NWSierra
NWSierra

Went to solid rear window. really happy with it. Always liked the look even if it was less one upgrade option. The old window was a mess, cracked at the top/bottom of each "slider" section. Kind of sh

Pryme
Pryme

I like the look too of the solid rear window. Looks clean. 

Posted Images

Erik. New Member

Erik.

Posted
Posted

Its probably from the top of rear side windows.  TSB 18NA383  they weren't sealed properly 

  • 2 weeks later...
LarryM Enthusiast

LarryM

Posted
Posted

I have a similar case but swear it has to be coming from the bolts that hold the spoiler on...this rattle started awhile back and noticed it was not inside, but rather from the outside. If you push on the spoiler on top, how much play does it have? compare it to the other side I'd say..

mihuntn Enthusiast

mihuntn

Posted
Posted (edited)

Mine is leaking from the other side. I also noticed the plastic trim piece on top of the window on the inside cracked in couple different spots. Dealership has a whole new back window on order for the crack and will properly seal it up. 2020 GMC 2500 AT4

56493913-4278-460B-A82A-1C105B87BEE6.jpeg

ED2249A1-6AD3-4F8D-A91B-DC2BF8615E5A.jpeg

Edited by mihuntn
  • 2 months later...
bowtie2007 Enthusiast

bowtie2007

Posted
Posted

After 2 straight days of rain the passed week, my back seats were wet and the windshield was fogged on the inside from the moisture in the cab. I'm calling the dealer monday.8643e1b57cf3eb27201060bad95dc5f9.jpgea74888f7c44a661e4955e76a08e341d.jpgf0285ad28f39fd40e40cdbca1a98c3c9.jpg

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Imcrazy Senior Enthusiast

Imcrazy

Posted
Posted

Sadly it seems the only long term sure fire fix is to have the slider replaced with a solid rear window. Seems Ram is having similar problems I’ve heard.


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Colossus Senior Enthusiast

Colossus

Posted
Posted
3 hours ago, Imcrazy said:

Sadly it seems the only long term sure fire fix is to have the slider replaced with a solid rear window. Seems Ram is having similar problems I’ve heard. 
 

Yes they are.  Sadly. 

sdelam Enthusiast

sdelam

Posted
Posted (edited)

My leak came from the spoiler bolts. Wasn't as bad as yours though. Mine was just a wet head liner that quickly dried. just happened to be driving in the rain with someone in the back seat that noticed it. They replaced/resealed the bolts and has been working so far. 

Edited by sdelam
Island Boy New Member

Island Boy

Posted
Posted

Well, I dropped mine back off at the dealership this morning.  The rear window was replaced back in October.  It has started to leak again in the top corners. 

Stand By Enthusiast

Stand By

Posted
Posted

Huge thread in the 19/20 silverado section. Including a recent mention of GMs avoidance doctrine. I have a sold rear window, not worried about that leaking. Keep my eyes open for the spoiler leak, though.

  • 2 weeks later...
bowtie2007 Enthusiast

bowtie2007

Posted
Posted

I just got mine back from the dealer but once i got home, i saw the headliner was damaged with a trim tool on both sides. The headliner is also loose and just resting on the window track. The headliner clips are broken. Taking it back to the dealer in the morning...aba31cce86751a55f45c922a20709c8a.jpg6c8ce7325acf9e5c813263592651b1a2.jpg

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ShotgunZ71 Senior Enthusiast

ShotgunZ71

Posted
Posted

My dealer tried a few times and it kept leaking. Since then, I've sealed it twice with good results. I'm certain over time the flexing of the truck and shrinking of the sealant may cause some intrusion. There are some who have use pieces of Trim-Lok at the top of the spoiler and also between the bottom of the spoiler and top of the window. I may try that myself in the future. It's obvious that GM is not concerned with repairing or redesigning these windows. They figure they just have to "try" for 36,000 miles and then it's not their problem...officially.

 

I have thought about going to an independent glass company and have it replaced with aftermarket, be it slider or fixed glass.

Tomato Enthusiast

Tomato

Posted
Posted
12 hours ago, bowtie2007 said:

I just got mine back from the dealer but once i got home, i saw the headliner was damaged with a trim tool on both sides. The headliner is also loose and just resting on the window track. The headliner clips are broken. Taking it back to the dealer in the morning...aba31cce86751a55f45c922a20709c8a.jpg6c8ce7325acf9e5c813263592651b1a2.jpg

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That sucks. It's amazing how things can get screwed up by "professional" mechanics.  Some just don't have any pride in their work.

  • Like 1
  • 2 months later...
tbully Enthusiast

tbully

Posted
Posted

Adding "mine" to the thread.

 

Built January '21 - ~150 miles on the clock.

 

Unbelievable they are shipping these knowing of this defect for this long.  Lawsuit territory.  I thought maybe I'd get lucky.  Nope.  😞

 

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