Rain Leaking Into Driver's Floor - Solved

Rain appears to have been leaking in through the windshield glue and ending up in my driver's floor.
For the past year after it rained, my driver's side floorboard would be full of water. This was new, so I took it to the local stealership for the TSB on the cowl seal. Stealership said they soaked it multiple times, in multiple ways and could not find the leak. I left intending to accomplish the cowl seal TSB on my own.
However, as I have not gotten around to accomplishing the TSB yet, recently when I took the truck to Watershed car wash, the washer blew the molding off the driver's side of the roof revealing what appears to be an opening in the glue holding the windshield on.
I filled the gap with Silicone II clear and it appears to be holding and, in doing, so keeping my driver's seat floorboard dry in the rain again.
Next, I intend to investigate whether the lesser leaks I have discovered in both rear seat floorboards are related to/coming from the molding tracks on the roof. Pics won't upload?

 

NM, pics uploaded.

 

Good to see you found the leak.
Has the windshield ever been replaced?

 

3 times.

 

Thx for posting. Just this morning I discovered water on the drivers side floor of my '08. Soaking wet in fact and it's been raining a lot lately. Prior to this I'd found water on the passenger floor and have done the home brew cowl fix as well as relaxing the antenna as the rubber grommet where the wire passes through the body was bad. All this time I'd assumed it was only passenger floor never bothering to check the drivers side, now I've found otherwise so this has given me another place to look. Assuming that this is the rubber strip that sits in the roof Chanel and that it just pops off the clips? Ughhh...

 

Good find, OP.

 

Yes, what I called the moulding is the rubber strip that sits in the roof channel. Mine popped off it’s clips at the car wash. Double sided outdoor-strength tape and using the silicone to hold the front did not keep it attached as the same car wash has since blown it off. I now have a tube of locktite cement with which I intend to glue it down, because the clips or the clip-mating points on the rubber strip appear to no longer function as intended? I cannot decide how the last 6” of the rubber strip attached to the rear of the roof, if not for some sort of glue? However, as I have not glued it yet, I’m happy for suggestions. I have also considered using camper shell seal to reattach, however discarded that idea when it seemed it would elevate the strip out of the roof channel. However, the roof channel needs the rubber strip because it filled with snow in Kansas last week.

 

The black portion of the gap in the non-silicon photos ^^^ is the windshield glue. Had I reviewed my photos before repairing I would have taken more to better show the gap(s) above and below the black bead of glue through which the water infiltrated my cab.

 

Thx for the clarification. Sorry I can't help with the reattachment, I've never had mine off until today. I couldn't see any separations in mine, will have to get in there again with a light source to see it more clearly. Curious- did you see any indication of water on the inside of the window area? At first I was pretty confident that my issue was the cowl that doesn't cover the heater air inlet...then when I got water after fixing that was sure it had to be the rubber grommet where the radio antenna wire comes into the cab as a garden hose produced water in that area. Now finding it on the drivers side I was hoping to see an issue like you had only to be able to cross that off the list.

Anyway- good luck with yours. I think I'm back to square one with mine.

 

No, I never saw indications of water on the inside of the window area. Nor can I say, for sure, whether enough rain has fallen since I applied the silicone to test my theory? However, when the water did appear, it mostly seemed to be accumulating/originating on the left side, and to the front, of the drivers floorboard. I believe we’ve had a decent rain since I silicone-d, and I believe it did not get wet? I’m just not .

 

Updating Dec. 27, 2020 - Had a gully washer rainstorm and zero/no water in floorboard. Clear fix to the formerly 1/2" deep water after the rain.

 

@WRDD Taco

 

Just got mine solved. Windshield seal was okay, just was lazy during my rack install and should have put rtv directly in the roof holes and not just gooped around the head of the bolts after tightening them

 

Added note since I didn’t read the thread first, I also thought I had the same issue as OP with the windshield leaking and after doing the same bead of rtv on the windshield area the leak continued and that’s what prompted me to look at the roof rack bolts again.

 

Ah ha! After I saw this stain on my rear drivers side ceiling, I located the culprit. Or this gap at the rear into which the roof-gully-strip apparently fits. Filled it last night with fipg.

 

My 2006 just began leaking on the passenger side. I will be trying this soon

 

My 2016 started leaking on the drivers side. This appears to be the fix for my truck as well. I’ll have to verify once the sealant cures. Thanks OP

 

Apparently this did not fully resolve issue. I'll have to do some more digging - I see a bit of debris around the driver's windshield wiper, but guessing it is the driver's side sunroof drain after doing some more searching.

 

The root cause ended up being the driver's side sunroof drain. Glad to have that issue solved!

 

My 06 double cab leaked during the heavy rains last night. There’s about a half a cup of water in the passenger floorboard…
We haven’t ran the AC at all.