Rear window leak

Memphis87 · May 19, 2020

7 hours ago, peterH said:

My dealer just told me there are going to fix the leak by sealing from inside the truck....

That would be a first That I’ve heard of a dealership doing it that way. Can’t hurt either way, the actual fix doesn’t work anyway when done from the outside. Unless you get a new window it seems like

Dunn · May 19, 2020

On 5/15/2020 at 9:08 AM, Leevon said:

Stay tuned ya'll...I just ordered a solid rear glass to convert my slider. This might seem crazy to some but my options are 1) let the dealer "fix" the leak and we all know how that is turning out or 2) trade the truck or 3) fix it myself permanently. I like the truck, don't want to trade it and I never wanted the slider anyway and I definitely don't want silicone goobered all over a $55k truck so solid window it is. The GM glass is coming out of Canada apparently there isn't much inventory. I am going to do some dis-assembly and prep this weekend I'll let ya'll know how it goes!

I got the conv 2 pkg and to be honest I really don't even use any of it.....stereo sounds a lil better, the rear window opening doesn't matter to me either.....my 2019 didn't have it and this one does have it.....I will probably never use it

and the conv 2 pkg was must on this truck, I just had to have it, lol now I got it, meh.....not really a big deal having tons of extra stuff on a truck.....

we don't get a ton of rain but my build date was 11/19 ....idk if that's early or late for HD trucks

abraham Lincoln · May 20, 2020

Are these the redesigned nuts? Just got them today from my local body shop. Wish i had the original ones i took off the truck, there somewhere in my shop/garage. They were a little bit wider and smooth.

Nelly13 · May 20, 2020

@abraham Lincoln I wish I could tell you. My truck is still at the dealership waiting on them since there on backorder. I can send those pictures to my service advisor and see if they can give a clear answer on that.

EricTheRed · May 22, 2020

On 4/29/2020 at 5:58 PM, ShamrockShooter said:

Interesting. Just realized the work truck trim doesn't have the spoiler on the back...

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I really wished this was a “spoiler delete” option on these new trucks.

Andrew David · May 22, 2020

Well 2 weeks with the TSB done and it held up during some storms. Last night it rained. When I check it there was water again. It was not nearly as bad but none the less it is back at the dealer for the weekend.

it is definitely coming from the spoiler. Because I dried the window and then tapped the spoiler and out can a drop of water.

You can see the water following the contour of the window frame.

oh 2020 LT Trail Boss with 1200 miles on the clock. First repair was done at 700 miles. Only had the truck 6 weeks. Build 11/19

Edited May 22, 2020 by Andrew David

the wanderer · May 23, 2020

On 5/19/2020 at 4:37 PM, Memphis87 said:

That would be a first That I’ve heard of a dealership doing it that way. Can’t hurt either way, the actual fix doesn’t work anyway when done from the outside. Unless you get a new window it seems like

I'm not so sure. If you live in really cold climates, water gets in and freezes, it expands, and boom, you have another problem.

CamaroVetteGuy · May 23, 2020

4 hours ago, Andrew David said:

Well 2 weeks with the TSB done and it held up during some storms. Last night it rained. When I check it there was water again. It was not nearly as bad but none the less it is back at the dealer for the weekend.

it is definitely coming from the spoiler. Because I dried the window and then tapped the spoiler and out can a drop of water.

You can see the water following the contour of the window frame.

oh 2020 LT Trail Boss with 1200 miles on the clock. First repair was done at 700 miles. Only had the truck 6 weeks. Build 11/19

Interesting. The 2019 I am looking at does not have that little grey trim piece in the corner of the rear window

Jav_eee · May 23, 2020

Interesting. The 2019 I am looking at does not have that little grey trim piece in the corner of the rear window

Grey paint on the window? It probably does. Black slider track plastic? Only if you have a sliding rear window

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Jav_eee · May 23, 2020

Interesting. The 2019 I am looking at does not have that little grey trim piece in the corner of the rear window

Grey paint on the window? It probably does. Black slider track plastic? Only if you have a sliding rear window

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CamaroVetteGuy · May 23, 2020

2 hours ago, Jav_eee said:

Grey paint on the window? It probably does. Black slider track plastic? Only if you have a sliding rear window

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It may have been the lighting

Andrew David · May 23, 2020

12 hours ago, CamaroVetteGuy said:

Interesting. The 2019 I am looking at does not have that little grey trim piece in the corner of the rear window

It’s not a trim piece. It’s the silk screening on the glass the flash is making it look grey.

CamaroVetteGuy · May 23, 2020

1 hour ago, Andrew David said:

It’s not a trim piece. It’s the silk screening on the glass the flash is making it look grey.

It’s now

DCazares · May 23, 2020

I don't own a T1 but my wife's Malibu had a similar problem that I recently did the TSB on myself by ordering the parts instead of going to the dealer. The problem was they used the wrong nuts that with were not locking and with time and vibrations were getting loose. Also the gaskets were so thin as seen on some of the pictures here that the new ones are about 4 times as thick. Here is the TSB for reference. Hope it helps if anyone suspects the leak coming from the rear spoiler.

https://static.nhtsa.gov/odi/tsbs/2019/MC-10165439-9999.pdf

Leevon · May 24, 2020

Today I finished up my slider to solid window conversion. Would I do it again? Yes. But cutting the urethane seal to remove the glass is a pain and I'd leave that step to a pro next time to save the aggravation. I can say confidently that these leaks COULD be fixed by removing the spoiler and sealing the top of the sliding window IF performed with the right products and extra cleaning and care. Replacing the glass is overkill. But with a slider you'll always have a cracked window frame, unless the design is eventually fixed and the glass is replaced.

The TSB is incomplete in my opinion, the products recommended are inadequate and the likelihood that it will be done properly at the dealership is a huge gamble obviously. If you want to seal the window frame then use a self-leveling urethane or seam sealer type product. Sealing the spoiler bolt holes is also critical, although I'd argue the majority of leaks are probably the frames not the holes. No matter who does the work, your headliner will have be molested, paint may be scratched removing the glass and something will probably break (a trim clip etc).

The solid glass cost me $257 and took a week to get through my dealer parts account. I spent about $120 on 3M products and specialty tools. I used 3M urethane primer, 3M window weld and 3M strip caulk. One tube of window weld (sealer) did the job. I rolled the strip caulk like play-dough and put it around all of the bolts. Once tightened, it squeezed through all holes and made a nice permanent seal. After the glass had been in for a couple of hours and the spoiler was replaced and everything buttoned up I put the truck outside just in time for a huge rain storm and it passed the test.