Well my 2019 Sierra has been in to the dealership for the first round of attempted sealing of the rear window leak. Now waiting for a new window which is on back order. Recalls for minor things like programming, or alternator cable are one thing but you'd think by now the would know how to make a sliding window that doesn't leak. By the service bulletin I've seen the plastic track is actually cracked. And, by the way, the bolt holes that secure the spoiler need to be sealed properly too. My trickle at the left rear corner became a full blown running leak at both sides after the first service attempt. I'm guessing the aforementioned spoiler bolt holes are the culprits. Takes the joy out of getting a new truck for sure.