New guy and leaking issues

[wvmountaineers]

First off, let me say that I have been lurking here since I bought a 2019 GMC Sierra 1500 AT4 last week. What a wealth of knowledge here. I sold my 03 Silverado, and bought the GMC. Loved my 03. Running like a champ after owning her for 18 years. Hope I get similar life out of the GMC.

 

Today I put a Truxedo Lo Pro tonneau cover on the truck. No problems putting it on. I decided to test it for leaks so I put the hose on shower and simulated some rain. Pretty good, except for small leaks at the corners near the cab. Has anyone had this, and what was the best way to fix it? I think if I seal the corners, it will be pretty dry.

 

After reading all of the posts on here regarding leaky rear windows, I figured” what the heck” and threw some water on the cab. Of course I had a leak from the drivers side corner of the rear window. It’s a slider, for anyone wanting to know.

 

My question regarding the infamous leaky window, is, what is the fix from the dealer? A gob of silicone, window replacement, or just luck of the draw with the dealer? How have the fixes been holding up? Slightly frustrated, but not really surprising after reading about all of the leaks on here.

 

 

Sent from my iPad using Tapatalk

[bwoodsmn]

46 minutes ago, wvmountaineers said:

 

First off, let me say that I have been lurking here since I bought a 2019 GMC Sierra 1500 AT4 last week. What a wealth of knowledge here. I sold my 03 Silverado, and bought the GMC. Loved my 03. Running like a champ after owning her for 18 years. Hope I get similar life out of the GMC.

 

Today I put a Truxedo Lo Pro tonneau cover on the truck. No problems putting it on. I decided to test it for leaks so I put the hose on shower and simulated some rain. Pretty good, except for small leaks at the corners near the cab. Has anyone had this, and what was the best way to fix it? I think if I seal the corners, it will be pretty dry.

 

After reading all of the posts on here regarding leaky rear windows, I figured” what the heck” and threw some water on the cab. Of course I had a leak from the drivers side corner of the rear window. It’s a slider, for anyone wanting to know.

 

My question regarding the infamous leaky window, is, what is the fix from the dealer? A gob of silicone, window replacement, or just luck of the draw with the dealer? How have the fixes been holding up? Slightly frustrated, but not really surprising after reading about all of the leaks on here.

 

 

Sent from my iPad using Tapatalk

 

First of all, welcome to the Forum, and congrats on the new truck! 

Rather than starting yet another thread, please go to the existing, exhaustive thread on the topic - your answers are there

 

[wvmountaineers]

First of all, welcome to the Forum, and congrats on the new truck! 
Rather than starting yet another thread, please go to the existing, exhaustive thread on the topic - your answers are there [emoji4]
 

Thanks for the suggestion. Being the new guy, I generally try to tread gently, but I don’t see anything in that thread regarding tonneau covers.


Sent from my iPad using Tapatalk

[bwoodsmn]

13 minutes ago, wvmountaineers said:

Thanks for the suggestion. Being the new guy, I generally try to tread gently, but I don’t see anything in that thread regarding tonneau covers.


Sent from my iPad using Tapatalk

I'm sorry, I read your question was about the leaking back window. My bad.

 

About the tonneau cover, if you are leaking at the front cab corners, double check your front gasket seal at the leading edge of the box.  Sometimes the seal is not all the way across, or, since your truck is a 2019, look at the front seal and see if its shrunk, or lost its pliability so that water can get it, around the gasket edges

[ericarenee]

On my  2020  different but similar cover. I had to put some foam rubber strips into the corners as they cover does not seem to lay totally flat. You could see light.. I had the stuff. its just  3m tape on one side and like  1/2 inch thick. most box store in there door seals and threshold area will have a similar product that will work.. 

 

 

Good Luck

[wvmountaineers]

On my  2020  different but similar cover. I had to put some foam rubber strips into the corners as they cover does not seem to lay totally flat. You could see light.. I had the stuff. its just  3m tape on one side and like  1/2 inch thick. most box store in there door seals and threshold area will have a similar product that will work.. 
 
 
Good Luck

That’s exactly the situation I have. I will try that. Did you apply the sticky side towards the bed, or use the sticky side on the underside of the liner?

This is the first time I’ve had a tonneau cover. I was worried about adding a bunch of extra foam then if I need to remove the cover to haul something large, having to re-do everything. That may be the case, but if there’s a way around it, I was hoping to learn.


Sent from my iPhone using Tapatalk

[bwoodsmn]

5 hours ago, wvmountaineers said:

That’s exactly the situation I have. I will try that. Did you apply the sticky side towards the bed, or use the sticky side on the underside of the liner?

 

Sticky side towards the bed - the cover will flex against the strips, so you want that side to be the pressure seal.

[Colossus]

Welcome.  I have to say that out of all the trucks I have owned, my 99 Silverado and 05 Sierra were my favorites.  That GMT-800 generation were good trucks.  Not perfect, but comfortable and reliable. 

[todd308]

Old post, but thought it might help others with the Lo Pro cover.  I've had one of these for awhile, and it leaks quite a bit at the front corners.  I'm pretty meticulous so I was surprised it leaked as much as it did, when I installed it I used extra foam pieces etc. even did some silicone work where I could still see light through.   Well today I was bored so I ran water over it, only took a few seconds to start leaking, and crawled under there.   It was immediately obvious where it was leaking from the worst, and it's not anywhere that seals are.   It's leaking mostly from the junction of the side rail with the plastic endcaps at the front and back of the side rails.  

 

Pic to help visualize, the leaking is occuring at the junction between part 26 and 15, the same is true at the rear of the side rail, but it's much less because the bed sits higher so all the water runs along the bed rails to the front corners.  It doesn't look like they put any sealant on these at all. 

 

I'm going to try to seal this area up as much as possible. Ideally the side rails would be removed, the end caps removed, and sealed, but I'm hoping I can seal it from the top and underside, without removing the rails entirely.  It's hard to seal it from the topside because it would interfere with the velcro slot. 

 

I do think it's interesting that you won't find anything on their website, descriptions, FAQ etc. that talks about how waterproof the covers are or leaking etc. but it's very clearly written in the user manual under troubleshooting that the covers are not designed to be water tight. 

 

At the end of the day it's probably the nature of these low profile covers, because they don't extend over the bed rails at all, and they don't stick up far enough to ensure rain runs off the bedrails it runs along the seam of the cover with the bedrail and can pool there.

 

 

Edited July 4, 2022 by todd308