Where to check for rear window leak

[Bgctrading]

I have been kind of ignoring the rear window leak issue on the 19 Silverados and have not looked to see if mine is leaking. Where and what is the first sign that it is leaking?

[Brandon Adams]

Mine was in the rear corners on both sides

[19TrailBoss]

Mine leaks drivers side corner..

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[UGADawgs]

https://www.gm-trucks.com/forums/topic/216705-rear-window-leak/?do=findComment&comment=2233921

[Bgctrading]

Well it looks like I have a February build 19 Leaker.