Trim leaking
 

I have a set of gmc trim around my door windows and I think when I wash my truck water leaks inside. Does anyone have any suggestions on what to use to try and keep water from getting in? Like some kind of liquid window sealer or cocking or something like that.

Re: Trim leaking
 

Flex Seal. They make many different products, I'd try that.

Re: Trim leaking
 

You need to put someone in the inside as you run the water

Re: Trim leaking
 

So were you thinking of something like there flex paste.

I will have to try having someone run water while I am inside. My only concern is that all the holes for the trim are not visible from the inside and I can’t touch them either so I might not be able to tell from that. My gas filler has been shaved and my drip rails are solid so I am pretty sure that it is my trim holes. I can actually wiggle one of the prices of trim in the hole. So it is probably the source of the leak.

Re: Trim leaking
 

I’m sorry I should probably have been more clear in my original post. I am fairly certain where the leak is coming from(to decorative trim around the side window). I was mainly looking for advice on how to stop it.

Re: Trim leaking
 

I would take steps to ensure you know for certain where the leak is coming from. Placing someone on the inside to watch and validate is advised before you start using product and guessing where it is coming from. This will also ensure you are using the correct product/solution for the issue.

Re: Trim leaking
 

Lets just assume for now that I know that it is leaking from the 8 or so holes drilled in the B pillar of the truck, that are only currently being filled by mettle clips. What material would you use to help plug the holes?

Re: Trim leaking
 

Not to over simplify, but I would pry the trim up with a plastic trim tool and use some silicone.

Re: Trim leaking
 

Simple is good.

Re: Trim leaking
 

I have trim around my GMC windows as well, I can't say it's the same as yours (66 Suburban) but it's secured with small hex nuts on the inside of the door. This area is still outside the rubber door seal molding. If water is leaking through the trim I think this would mean your door seal is also leaking.

Re: Trim leaking
 

The trim behind the door is what I think is the culprit. I am assuming that the suburban trim doesn’t have the squared off part like the pickup has. The part that is on the door has bolts around the window except for the part in at the bottom of the windows which has clips. There is probably water getting inside the door at that location also. My weather stripping is all fairly new so it is hard for me to imagine that the water is going though the bolt holes and then getting through the weather stripping and then around the corner into the cab corner. Plus I have a cup inside the cab corner that I use as a cup holder and it had water in it so the water has to be coming from directly above the cup.

Re: Trim leaking
 

I do appreciate all the suggestions and help and if my last comment seemed sarcastic I didn’t mean it to sound that way.

Re: Trim leaking
 

In order to fix it you will probably need to remove the trim then use strip calk on the clips and reinstall them

Re: Trim leaking
 

Not at all, just hoping to find a solution to your water leak issue. Your window trim is the same as my Suburban but I can see what you are referring to. I believe in my case the trim holes were somewhat sealed when it was painted years ago. I think nsb29 is correct with his suggestion. btw - I'm a big fan of your truck!

Re: Trim leaking
 

I like all blue trucks

Re: Trim leaking
 

I used a bit of grey Butyl tape that was used on my travel trailer. Apply a little on the threads of the screw (on the outside of door behind the moulding) and some on the threads as I threaded down the bolt side. Any excess I carefully pulled it away.

Re: Trim leaking
 

I really like the idea of Strip Caulk especially sense it stays playable and never dries.