2014 Silverado Passenger Side Water Leak

BFiore · November 2, 2020

I've read so many different posts on similar issues with the K2XX but still don't think I've fixed my issue. The weather here isn't great until the end of the week but I've "sealed" a few more items and I'm going to do the hose test later this week.

Symptom: Passenger side carpet and padding (front and rear) soaked all the way through

Condition: Occurred from vehicle sitting (parked) for a few weeks during some rainy days. Vehicle always parked with nose higher than rear of vehicle. No sunroof on my vehicle.

Investigations done: So far I've checked for a plugged AC drain and found that to not be an issue. I sealed the passenger side wiring harness boots, both the door and the one behind the fender just below the cowl. I feel like what's remaining is either the windshield or maybe something with the cabin air intake? I've sealed the shark fin antenna even with it being on drivers side just to make sure.

If anybody has other suggestions I will gladly accept help. I really don't want to tear apart the inside of the vehicle too much but if water test doesn't reveal the location of the issue I'll probably need to do this next.

Thanks for any help!

14LTZ-1LZ · November 10, 2020

rav3 · November 10, 2020

Great video. Thanks for sharing it. With all the work it takes to remove the finder, I hope I never get that water leak.

14LTZ-1LZ · November 13, 2020

Here is another suggestion. Saw this guys replacing his radio antenna wire which went through the firewall from the side.

BFiore · November 16, 2020

Was having issues with this forum for a bit so didn't post my water test results but it's back up and running. I went out with a hose and for about 5 minutes would soak the truck, I did this about 4 times with about an hour between doses. I could not see water running or trickling anywhere so I stopped spraying more water. I went back out a few hours after the last spray and of course saw water accumulating with no water lines that I could see to trace where is was coming from. I have not sealed the cabin pressure relief vents (or whatever they are called) at the rear of the cabin next to the bed. This might be my next step but I'm not sure as it's still leaking but doesn't seem as bad.

I actually already sealed the connections behind the passenger fender like 14LTZ suggested, this includes where the antenna comes in to the vehicle as well.

JimCost2014 · November 17, 2020

12 hours ago, BFiore said:

Was having issues with this forum for a bit so didn't post my water test results but it's back up and running. I went out with a hose and for about 5 minutes would soak the truck, I did this about 4 times with about an hour between doses. I could not see water running or trickling anywhere so I stopped spraying more water. I went back out a few hours after the last spray and of course saw water accumulating with no water lines that I could see to trace where is was coming from. I have not sealed the cabin pressure relief vents (or whatever they are called) at the rear of the cabin next to the bed. This might be my next step but I'm not sure as it's still leaking but doesn't seem as bad.

I actually already sealed the connections behind the passenger fender like 14LTZ suggested, this includes where the antenna comes in to the vehicle as well.

Long shot, have you checked your 3rd brake light housing?

Water travels in the truck once it gets in. Stains on the headliner anywhere?

14LTZ-1LZ · November 17, 2020

BFiore,

When you did your test were you able to tell if the water was coming from the front or rear.?

BFiore · November 17, 2020

I did check the third brake light and sealed it even though it looked fine.

It's tough to tell where the water is coming from but it almost appears it's somewhere in the middle. The first spot I typically see water is right near the B pillar but this could be from the wire track or loom or something it's running down.

14LTZ-1LZ · November 18, 2020

Ok, I know this is a different year vehicle, but check your weather strip on the passenger door.

Harvane · August 18

On 11/2/2020 at 11:55 AM, BFiore said:

I've read so many different posts on similar issues with the K2XX but still don't think I've fixed my issue. The weather here isn't great until the end of the week but I've "sealed" a few more items and I'm going to do the hose test later this week.

Symptom: Passenger side carpet and padding (front and rear) soaked all the way through

Condition: Occurred from vehicle sitting (parked) for a few weeks during some rainy days. Vehicle always parked with nose higher than rear of vehicle. No sunroof on my vehicle.

Investigations done: So far I've checked for a plugged AC drain and found that to not be an issue. I sealed the passenger side wiring harness boots, both the door and the one behind the fender just below the cowl. I feel like what's remaining is either the windshield or maybe something with the cabin air intake? I've sealed the shark fin antenna even with it being on drivers side just to make sure.

If anybody has other suggestions I will gladly accept help. I really don't want to tear apart the inside of the vehicle too much but if water test doesn't reveal the location of the issue I'll probably need to do this next.

Thanks for any help!