I really need some help every time it rains I find water in the trunk behind the wheel welds on both driver and passenger sides not coming from top of truck because my top liner is dry. Can someone please help me figure this out I would really appreciate it.

Thanks

 

Look for any water marks/staining around the tail lights. I had this on my '06:



And when I looked up around the trunk seal I saw this:








Apparently the sealant between two of the body sections is leaking. You can buy automotive body sealant, well...where else? Amazon

 

Thanks I will check those areas