Hey, throwing out a line here...

Woke up this morning to a back seat filled with water after some rain, however there is no visible holes, damage, or anything that looks wrong to the exterior, the headliner appeared to feel wet this morning, the only thing that i could think that caused this is the third brake light seal.

Any help on this would be greatly appreciated.

 

yup..you guessed right..had the same prob with my ext cab..take your 3rd brake light apart, clean the seal and any dirt on the cab..reassemble, test for leaks

 

and use a little silicone

 

it's rained hard as hell here and still hasn't leaked..I was getting water in my cup holder before I fixed it

if it starts leaking again, I'm doing a flush mount, blacked out led mod