Rear window leak

SilveradoRST · January 22, 2020

Wondering if going through an automatic car wash, the down force pressure of the water or even the dryers after would cause the plastic window frame to crack.

*I know, automatic car washes are satan’s bath houses. But I do go to the touchless ones when I can’t get to a coin wash.

JohnCasey · January 22, 2020

19 minutes ago, SilveradoRST said:

Wondering if going through an automatic car wash, the down force pressure of the water or even the dryers after would cause the plastic window frame to crack.

*I know, automatic car washes are satan’s bath houses. But I do go to the touchless ones when I can’t get to a coin wash.

I’ve never taken my truck to one. I did take my wife’s care to one by our house after the last ski trip and I was impressed with the cleaning job it did and to be honest it didn’t look any worse than a moderately hard rain.

Engine Oil · January 22, 2020

My truck leaked too Mine is an August 2018 build that I purchased in late 2019. Noticed it after having the truck home for one day. Noticed a musty, moldy smell. Truck did not have that "new car smell" The dealership found the rear window was leaking. replaced the rear window, seals, rear seat, rear floor carpet that was Soaked, new head liner, cleaned up all the rusty metal seat brakets and other wet items in the back of my crew cab. If you notice any funny smell, check the seat carpet. Mine had no visible indication of water leaking.

Jamie73 · January 22, 2020

That's how mine was when I purchased it. It had a very strong new car smell, like they spayed something in it just before I test drove it, that quickly went away. A couple of weeks later I got in the truck and it smelled like wet carpet. This happened several times over the next couple of months. I finally found wet carpet just inside the drivers side passenger door, and that's when I discovered the leaking window. I should have taken the truck back as soon as I smelled it the first time.

Edited January 22, 2020 by Jamie73

hotrodz37 · January 22, 2020

Well I thought I was safe until I was at the dealer for a transmission issue today. Figured I’d poke around while I was waiting and sure enough, drivers side has a small dribble inside the back window. Luckily nothing like some of you are experiencing but add this to a long list of other issues with my truck that only has 700 miles on it.

Sent from my iPhone using Tapatalk

gmcsierra71 · January 23, 2020

When I look at page 3 from the PDF listed below:

https://static.oemdtc.com/TSB/MC-10156903-9999.pdf

It appears that the design of the cab and rear spoiler (with it being sloped) would dump water right on top of the rear window.

Ajayen · January 23, 2020

When I look at page 3 from the PDF listed below:
https://static.oemdtc.com/TSB/MC-10156903-9999.pdf

It appears that the design of the cab and rear spoiler (with it being sloped) would dump water right on top of the rear window.

This pdf explains what they did to my truck to “fix” the leak. Thanks for sharing.

Sent from my iPhone using Tapatalk

sdkraemer · January 23, 2020

13 hours ago, gmcsierra71 said:

When I look at page 3 from the PDF listed below:

https://static.oemdtc.com/TSB/MC-10156903-9999.pdf

It appears that the design of the cab and rear spoiler (with it being sloped) would dump water right on top of the rear window.

So from factory, I wonder if the sealant is applied by human or by machine?

If there is no crack in the window, has anyone had success with reapplying sealant fixing the leak?

Jamie73 · January 23, 2020

Just escalated mine issue to GMC, after several calls to my dealership over the past three weeks and at first being told that my window would be in, in a week, to today being told, we have no idea when your window will be here. I decided it was time to call GMC. The lady I talked to was very nice and helpful and of course now I am waiting on a call from a senior service advisor, in guess what? 2 days.

JohnCasey · January 23, 2020

Yup Jamie, All correspondence for whatever reason takes them two days. I asked why can't you hang up the phone with the dealership and then call me? They said that they are very busy and that is not how it works. Its all just a stalling tactic to make you feel like they are actually doing something for you. The senior advisor only talked to my dealership once and the executive rep only spoke with my dealership when I conference called them together. I had a shipping confirmation last week on my headliner, it has since been rescinded and the glass came in so now I'm going on 54 days and still no truck.

Jamie73 · January 23, 2020

Hey John, thanks, and too bad about your vehicle, I hope it gets resolved soon. I have kept up with this forum since I found my leak so I have an idea of how things operate when you escalate it. I worked in customer service for years and that is exactly why I called GMC. I just got tired of my dealer telling my I don't know. Tell me anything but that, and if you don't know, which he probably does not, find out the answer. I'm fine with the dealer telling me, hey this is a nationwide issue the windows are on backorder, you are in line to receive yours in 3 weeks, or whatever. It's hard to believe there is such a shortage of rear glass. You think the glass company could make 100's of these in very little time?

JohnCasey · January 23, 2020

Not only that Jamie but they are making trucks every day with the same windows and headliners. The only reason theres a nationwide shortage is because they are putting production and sales above warranty. I'm not making payments through GM financing or anywhere else. I paid my truck in full at the time of pick up. The senior customer service crowd kept telling me they couldn't reach the dealership and such. My dealership told me they never called and I don't think they were trying to help just stall for time. Have they told you there would be compensation offered? They've told me they want to compensate me for the time out of the vehicle but won't make an offer and don't want to talk about it until the truck is repaired. I got switched over to the executive customer service crowd when I compared their compensation negotiations to the Healthcare Law. I guess I have to buy it and then see what I've bought.

2016 Sierra Owner · January 23, 2020

17 hours ago, gmcsierra71 said:

When I look at page 3 from the PDF listed below:

https://static.oemdtc.com/TSB/MC-10156903-9999.pdf

It appears that the design of the cab and rear spoiler (with it being sloped) would dump water right on top of the rear window.

Yup that is what I suspected as well. Just looking at my back glass the best I can.

Jamie73 · January 23, 2020

Unbelievable. This is the first car payment I've had in about 15 years. I decided to take the incentives and one of them was financing the vehicle. If worse comes to worse, I'll just stop making payments. Me credit would be hurt, but I'm not really that concerned about it. I have a good friend that is a high dollar lawyer and he said he would start writing letters if i wanted him too, but I'm still early in the process and just want my truck fixed. I told him I would give the dealer a chance to get it right to my satisfaction, no leaking window, replace the back seat with rusted brackets, replace my rusted jack, and replace any hardware that is corroded. If this taken care of great, if not I will get him involved. We shall see.

JohnCasey · January 23, 2020

They did offer to make a payment for me when I had 20-25 days in. They stopped all of that when they figured out I didn’t finance tthough them and paid in full.