for the first time in a month saturday night. The next time I used my truck was on Monday, and it was closed up in the meantime. It smelled a little funky, and I found the carpet is wet along the driver's door. As you can tell, I suspect that the door is leaking. The other possibility, I guess, is that the AC drain is plugged. For those of you who have had the problem of a plugged AC drain, was the water along the driver's door or on the trans hump and the floor under the dash?

I think I am having a weatherstripping problem.

 

AC drain was a wet carpet on the passenger side. I have a slightly leaking cab light, second one in on drivers side, that leaks on the drivers front corner of the headliner. You may also want to check the third brake light seal along with the rear sliding window.

 

My front drivers side was getting wet from a rear window seal leak. The water runs down behind the back seat and flows along the seam into the front. Replaced seal fixed leak.

 

I agree with what has been said. Easy way to find out if you have a door seal leak is to take a water hose and run it over the area with someone inside watching. We could tell my door seal was leaking within 10 seconds. I think the seals tend to shrink along the cab side and allow a gap.

But, check your third brake light first, especially if the bulbs have mysteriously "burned out" on you.

 

I opened the drivers door to look at the stripping mounted on the doorframe and found that it had slid forward to where about 9" of it was hanging down between the front of the doorframe and the door. Slid it back up, and I think that is it, but I will check the rear seal. The "hose trick" oughta tell me whether I got it or not.