2005 Hummer H2 Windshield Leak

Spoiler alert: It wasn't the windshield leaking. it was the marker lights!
I already sealed the rear drivers side marker light a few years back. now the front passenger side started to leak.
Easy fix with RTV.
I figured I'd seal the front drivers side too, but when I pulled the light, I saw that the previous owner had already sealed it! It looked good, so I left it as is.
Rhe back marker lights are a pain to get to the rubber grommet. I used a hot knife to melt the roof rack plastic away for access. the cut is under the lens, so you can't see it when it's put back together.