So i found this forum because i recently purchased my 2019 Silverado and i also have this leak. I purchased a 2019 Silverado RST Z71 Crew Cab and 2 days later noticed that the rear window was leaking. I brought the vehicle back to the dealership on the 3rd day, less than 72 hours from day of purchase. The dealer has a 72 hour return policy. Unfortunately i also had a trade in which was a 2000 dodge dakota which they gave me 3k for in trade value. The dealer has done the initial repair of adding sealant to the top of the window channel. The service department called me and stated they completed the repair according to the service bulletin but it was still leaking and they were waiting to hear from the chevy rep to figure the next repair. They said it would be about a week before the chevy rep was back in their store...i told them that was unacceptable. I called the sales individual and told them i would be coming to the store the next day to discuss the matter. Obviously the sales person has no reach to accomplish anything and decided to speak with his sales manager. He stated he was going to look through their inventory and see if they could find a like vehicle to possible trade me into, which i think they just said that to get more time for the window repair. I opened a case with chevy and the next day i get a call stating my vehicle was repaired and ready for pickup. I went to the dealer and went over it with a fine tooth comb. There was rust buildup on one of the seat bolts, and whoever put the sealant on took no care whatsoever. Its a seamless window for a reason. I talked with the sales manager and told him i will not accept the truck in its current condition. Supposedly the store manager is still looking for a replacement but im not holding my breath. I guess my truck is a little harder to find as it has a sunroof which usually came on the higher models. Im just at a loss and have no idea what to do. This is all new to me as I have never purchased a brand new vehicle, let alone one that cost 45k. What should i do?!?!