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Equipment & Gear => Power Equipment & RV => Topic started by: jstone on February 03, 2020, 08:38:24 AM

Title: 2015 Chevy window leak?
Post by: jstone on February 03, 2020, 08:38:24 AM
I am getting some water in threw the drivers side coming in by the e break. Ideas on what and where to look. Thinking of getting the window taken off and resealed? Ideas

2015 Chevy 3500 HD crew cab gas
Title: Re: 2015 Chevy window leak?
Post by: Woodchuck on February 03, 2020, 09:18:03 AM
I would check cowl drains first. You can check the windshield seal by spraying soapy water around the seal on the outside and then blow air from a compressor on the inside and see if you get bubbles.  :twocents:
Title: Re: 2015 Chevy window leak?
Post by: baker5150 on February 03, 2020, 09:21:15 AM
My 17 leaked from the windshield in the upper corner.  Water worked it's was down to where I saw it dripping onto the floor board and pooled a bit on the dash.
When it sits it'll get the liner wet above the A pillar too.
Took about 40k before I noticed it.
Dealer said they had seen a few like this.
Title: Re: 2015 Chevy window leak?
Post by: AROTTY on February 03, 2020, 10:06:40 AM
99% on a 2015 its coming from the sharkfin antennae. They redesigned it in 2016 due to leaks. I haven't sourced one out of a junkyard yet so for now on my truck i have clear gorilla tape at the seams.
Title: Re: 2015 Chevy window leak?
Post by: jstone on February 03, 2020, 10:08:20 AM
I will try to seal that and see if that helps
Thank you
Title: Re: 2015 Chevy window leak?
Post by: jackelope on February 03, 2020, 11:41:18 AM
It would be really weird for a windshield to just start leaking on a 5 year old truck. It's a pretty rare leak point and 99% of the time only happens on brand new windshields or brand new vehicles.

If you're going to replace the antenna, I'd suggest avoiding the wrecking yard route and replacing it with the updated design. Maybe goes without saying.
Title: Re: 2015 Chevy window leak?
Post by: AROTTY on February 03, 2020, 11:58:52 AM
Yea should of specified that. Replace with 2016-18 design
Title: Re: 2015 Chevy window leak?
Post by: TSLPE on February 03, 2020, 12:04:57 PM
I had a shark fin replaced on my 2008 Duramax and it was over 1000.00. A year after that when it started leaking again an bought an 8.00 tube of silicone and ran a bead around it. No more leaking !
Title: Re: 2015 Chevy window leak?
Post by: Tenkara on February 03, 2020, 12:10:54 PM
99% on a 2015 its coming from the sharkfin antennae. They redesigned it in 2016 due to leaks. I haven't sourced one out of a junkyard yet so for now on my truck i have clear gorilla tape at the seams.
This was the same issue mine had.
Title: Re: 2015 Chevy window leak?
Post by: nwmein199 on February 03, 2020, 12:15:01 PM
99% on a 2015 its coming from the sharkfin antennae. They redesigned it in 2016 due to leaks. I haven't sourced one out of a junkyard yet so for now on my truck i have clear gorilla tape at the seams.

Had this problem on my 2014 silverado. Took the fin off, bead of silicone, and all sealed up.

Started with a puddle in the drivers foot well. Kept following the water up through the dash to the shark fin
Title: Re: 2015 Chevy window leak?
Post by: jstone on February 03, 2020, 01:06:33 PM
Just ran a bead of silicone around the outside of it.!
Crossing my fingers thatís it
Title: Re: 2015 Chevy window leak?
Post by: jstone on February 03, 2020, 01:08:12 PM
Thanks again all of you.

Jstone
Title: Re: 2015 Chevy window leak?
Post by: Pnwrider on February 03, 2020, 01:27:45 PM
Do you have a sunroof? Thatís another fairly common culprit. The drain ducts get clogged and in comes the water!
Title: Re: 2015 Chevy window leak?
Post by: jstone on February 03, 2020, 01:33:31 PM
No sun roof,
Title: Re: 2015 Chevy window leak?
Post by: BrandonWatts on February 04, 2020, 04:09:50 PM
My 14 gmc was leaking a couple years ago, found it was the shark fin. There is a small notch in the back of the fun that let water in. Put a small bead of silicone on it and the leak stopped. Lot easier then pulling the headliner.
Title: Re: 2015 Chevy window leak?
Post by: jstone on February 06, 2020, 12:21:10 PM
Sealed it. But I think the water must have shorted out a fuse. My dome lights wonít come on when I open the door and the driver brake light and blinker donít work. I checked the fuses in the engine compartment will check the ones in the door panel tonight.? Has that happened to you to?
Title: Re: 2015 Chevy window leak?
Post by: jstone on February 17, 2020, 10:28:19 AM
Ok had the window shop test the windows all is good. Iím not a mechanic so if the heater core is leaking on the passenger side would it smell like antifreeze?
I took the lower panel out and lifted up the carpet. It is all wet under passenger side. Coming from the fire wall. I soaked up the water in the carpet and padding
Title: Re: 2015 Chevy window leak?
Post by: Stein on February 17, 2020, 10:33:30 AM
I've never seen the 2015, but most heater cores operate by diverting some or all of the coolant through the firewall and heater core and there is a water to air heat exchanger that takes heat from the coolant and pushes hot air into the cabin.

When I have heard water or gurgles in the cabin it is because of this section of coolant line that goes through the firewall and you hear bubbles or air in the line which sounds like running water or gurgles.

If it leaks, it leaks coolant and you would see and possibly smell the slightly sweet smell.

I also had a Suburban with a leak in the windshield that ended up puddling under the carpet on the passenger side.  I never saw any water anywhere except under the carpet, but after crossing everything else off the list we replaced the windshield and dry as a bone since. 
Title: Re: 2015 Chevy window leak?
Post by: Crunchy on February 17, 2020, 10:51:19 AM
Ok had the window shop test the windows all is good. Iím not a mechanic so if the heater core is leaking on the passenger side would it smell like antifreeze?
I took the lower panel out and lifted up the carpet. It is all wet under passenger side. Coming from the fire wall. I soaked up the water in the carpet and padding

Yes you should be able to smell it and when you turn the defrost on the windshield will likely fog up.  At least mine did.
Title: Re: 2015 Chevy window leak?
Post by: nwmein199 on February 18, 2020, 03:18:10 PM
Ok had the window shop test the windows all is good. Iím not a mechanic so if the heater core is leaking on the passenger side would it smell like antifreeze?
I took the lower panel out and lifted up the carpet. It is all wet under passenger side. Coming from the fire wall. I soaked up the water in the carpet and padding


So are you saying you sealed the leak at the shark fin and you still have leaking but on the passenger side of the truck? Was it always leaking on the passenger side only?
Title: Re: 2015 Chevy window leak?
Post by: jstone on February 18, 2020, 04:02:57 PM
The passenger side is very wet. I have it in the shop as I type
Title: Re: 2015 Chevy window leak?
Post by: Buckmark on February 18, 2020, 04:30:48 PM
The passenger side is very wet. I have it in the shop as I type
Drill a hole in the floor, problem solved  :chuckle:
Title: Re: 2015 Chevy window leak?
Post by: Shaqdiesel on February 18, 2020, 07:18:04 PM
When I had a faulty door seal on my front passenger side, we found it with one person inside the truck and the other spraying a hose on the roof. I had discovered a wet floor when vacuuming the truck under the floor mat and went from there. 2011 Sierra
Title: Re: 2015 Chevy window leak?
Post by: High Climber on February 18, 2020, 07:31:02 PM
Those trucks are notorious for leaking from the OnStar antenna...
Title: Re: 2015 Chevy window leak?
Post by: Black Ghost on February 18, 2020, 08:25:09 PM
I had dealership fix and reseal the original sharkfin twice.  Each time the problem returned within a year.  I just had the dealership replace the shark fin with new design.  GM takes little to no ownership for this problem. I have the 2015 duramax 3500 and water was pooling on passenger floor board, lost all navigation feature.  I am satisfied this time it is fixed., but time will tell. The small gap that was  in back of the original fin is now replaced with a solid gasket seal.  Dealership charged me $550 for replacement and installation.  Any silicone temp fix will not have long lasting impact, replace it and save yourself the future headaches.  I feel your pain, love this truck but cant believe they dont do a recall and fix this problem without putting the financial responsibility to loyal customers.
Title: Re: 2015 Chevy window leak?
Post by: jstone on February 19, 2020, 08:36:51 AM
The shop looked at my truck. Not the heater core. He said water is getting in somewhere in the seam in the firewall? Told me to take it to a body shop and have them take the fender off and look at the seam. There was some pine needles in the dash. This crap is driving me nuts.!!
I have the carpet up and drying it out during the nice weather