Rain leak at both rear corners of cab floor.

After a week of rain showers, I noticed wet carpeting at both rear corners of the cab. Rear window seal seems to be fine. Any ideas? Thanks

 

Double cab or crew cab?

 

My 04 F150 leaked at the 3rd brake light and did the same thing. I got thin weather stripping and ran it most of the way around to divert the water around and back, and if any got in it had an exit spot. Has worked for about 5 years.

Edit: 'did the same thing' means wet carpet in the back corners. The leak in the third light weather stripping allowed water to run down and around the rear window and pool at the back of the cab (mostly because that is the low spot while parked in my driveway).

 

Extended Cab

 

Rear window slider drain holes plugged?

 

Thanks to Bruno and Gin. I'll check both those possibilities out and let you know. Cheers.

 

Agree with the slider drain holes. I had a glass guy tell me that’s where they leak. Clean it out from inside the truck and blow compressed air in the channel. You could also make sure the third brake light isn’t leaking. You can get aftermarket gaskets online.

 

Do you park your truck pointed downhill?