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HVAC gurgling noise

calgator73

By calgator73
in Troubleshooting & Recalls

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Silverado-Hareek Senior Enthusiast

Silverado-Hareek

Posted
Posted

 

Where is this located?

Crawl under your truck by the passenger seat and look up kind of in the middle and just behind the engine bay....you should see a black hose or drip tube hanging down. Guessing 3/8" diameter. I need to figure out a way to shoot compressed air in mine.

 

 

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Silverado-Hareek Senior Enthusiast

Silverado-Hareek

Posted
Posted

Bought a cheap air compressor at lunch today from Lowe's. I'm going to try to blow out my condensate line tonight after work and see what happens. I'll report back.

Silverado-Hareek Senior Enthusiast

Silverado-Hareek

Posted
Posted (edited)

 

Where is this located?

I was wrong man it's behind the passenger side wheel well liner about halfway up the firewall. A black rubber nozzle sticking out and turning down 90 degrees like an elbow fitting. And I guess mine is draining fine since this is where I saw water on the frame the other day and the wheel well miner was wet....I had assumed something over flowed. I'm going to get my mechanic to shoot air up there while it's in the shop tomorrow just to be safe. I really feel like the truck used to drain more water. There were noticeably large water spots on the ground and I just don't see them anymore.

 

 

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Edited by Silverado-Hareek
  • 3 years later...
black00ta Enthusiast

black00ta

Posted
Posted

Any updated on this? Mine has been doing this starting last year, I've tried cleaning the drain and this does not seem to be the problem? Logic tells me this is bubbling from inside the heater core - because it will start to do it almost immediately on startup...

Thoughts?

Thanks

-Ryan

  • 5 years later...
6.2SierraDenali New Member

6.2SierraDenali

Posted
Posted

My 2018 sierra Denali 6.2 does this occasionally upon initial start up. Then stops roughly two or three minutes after it’s been idling. It comes from under the truck roughly around where the transmission is. Would this be the same issue or something different? 

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