TFB

Just wanted to give everyone a heads up that it is possible to financially get out of the truck. I bought a ‘20 LT TB back in January ... rear window started leaking in February and was fixed per TSB. In August, started leaking again. Instead of going back to the dealer, I started emailing Ram/Toyota/Ford dealers and was able to make a deal for a new Ram Big Horn Night Edition. Very comparable to the TB minus the “off road” features. My TB was a lease with 5k miles on the odometer. The payoff was $43k and the Ram dealer gave me $45k. I realize some people have brand loyalty, but if you aren’t and don’t feel like dealing with trips to the dealer or gambling on your state’s lemon law, you can get out of the truck and not be upside down.

2020 Silverado LT Trail Boss. September 2019 build (Mexico). Purchased on 10 January 2020 and the leak showed up one month later right around 1,000 miles.

Here is the language from the TSB: "Important: When verifying this condition, ensure that the water leak path is due to cracks in the rear sliding window plastic upper rail glass guide, and NOT a leak in the primary urethane seal, between the window and the body; or from the spoiler attachments to the truck cab which are in the same area. Please indicate power sliding rear window crack in warranty claim verbiage. A leak in the primary urethane seal should be addressed by removing and resealing the window, using the standard service procedure from SI. R & R the roof rear spoiler and apply seam sealer to the rear sliding window top encapsulate, following the steps in the Service Procedure below." So, it looks like it does address removing the window if that seal is determined to be the source of the leak. We'll see. As an engineer, whenever you redesign something, it should be tested. How GM didn't catch this when testing the 2019 redesign is amazing and inexcusable.

I just can't believe GM isn't more concerned about this. There could potentially be thousands of 2019/2020 Silverados and Sierras out there in the future that are worthless because the rear window leaks constantly. I was hoping the new window installations would fix the problem, but it sounds like those are failing now too. I'm bringing my truck into the dealer Monday morning to have the TSB done, but at this point, it sounds like nothing works. I am almost hoping my leak persists so that I can submit a lemon law claim and walk away from the truck. It sucks too, because I like everything else about the truck ... but this is a pretty significant problem.

Brought my truck into a Chevy dealer near me and was told they'll need to have their water-leak guy look at it on Monday. The service consultant had not heard about the issue, so I showed him the TSB and this thread. We'll see how they proceed, but I am holding out hope being that they're a larger dealer with a body shop on site.

I'm 37. I have owned 2 VWs, 1 Subaru, 1 Nissan, and 1 Toyota. My 2006 VW GTI had a wastegate actuator rod fail on the turbo at 10,000 miles, and that was by far the worst problem with a car/SUV I had experienced until now. I drove the other 4 vehicles for about 50k-60k miles each, and not one problem. This is not the norm and I expected better from a company who doesn't shut up about their J.D. Power 'Best in Initial Quality' awards. I called GM Customer Care and spoke with someone who had a heavy accent and I couldn't understand, so it was a struggle. Do they just record the complaint and move on? Do they only "open cases" in the most extreme situations, like waiting 90 days for a fix?

Yep. 2020 Chevy LT Trail Boss. Bought it on 1/10/2020. This is the first GM car I have ever owned and I am regretting that decision.

Add me to the list. I have owned the truck for about one month. 1,050 miles. Build date of September 2019. Being an engineer, it is baffling why GM has not implemented a fix in the factory. Pathetic.