B Pillar Leak - 2018 Yukon XL

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Aerohokie

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Hello everyone. 2018 Yukon XL with sunroof:

i got in the Yukon yesterday and the driver seat belt was soaked. There was water present on the floor behind the driver seat. There has been a lot of rain recently. I shot some air in the sun roof drains and ran vinegar water through them, all 4 are clear. Let’s say the drains weren’t the problem and the sunroof didn’t overflow. Where else could this water be coming from? Bolt in roof rails perhaps?

The seatbelt was soaked, so it had to be up high. I’ve replaced the shark fin already, so I doubt it’s that, much less water being in b pillar.What else do I check before putting it together?

also, I gout the top part of the b pillar pried off, is it all clips the rest of the way down? It looks like its in two sections, does it come out as one piece?

thank you!
 

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