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Clogged AC drain

TMD
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newdude Senior Enthusiast

newdude

Posted
Posted
3 hours ago, Whitetail5 said:

I'm thinking this isn't for 2019 or newer models.  

 

 

What isn't?  Where the drain is?  Because that is where it is.  That picture above is right from the service manual for a T1 new body pickup.  

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chadman
chadman

Interesting. They can usually be cleaned out through the drain hole. Would have to be something misassembled or misaligned with it being so new. Dash tear downs usually leave you with squeaks and ratt

batman900
batman900

Any way to prevent this from happening? Anyone have a pic of where to snake from if it does clog?

TMD
TMD

I have never had it happen on any other vehicle I have owned, so your guess is as good as mine. I drove less this spring because I ended up working from home - that might have had something to do with

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Whitetail5 New Member

Whitetail5

Posted
Posted
23 minutes ago, newdude said:

 

 

What isn't?  Where the drain is?  Because that is where it is.  That picture above is right from the service manual for a T1 new body pickup.  

Ok it looks like in the picture that it is over near the motor and kinda higher than expected.  

Can you give me more details about where exactly to look ? Do I have to remove anything to see it. Thanks 

newdude Senior Enthusiast

newdude

Posted
Posted
17 hours ago, Whitetail5 said:

Ok it looks like in the picture that it is over near the motor and kinda higher than expected.  

Can you give me more details about where exactly to look ? Do I have to remove anything to see it. Thanks 

 

 

Its pretty much center of the transmission tunnel/firewall.  You will have to pull the right front wheel and wheel liner out to make it easiest to get to from the tech I just asked.  

 

Here's a picture of the drain from a truck we have the transmission out of:

 

IMG_6535.thumb.jpg.d88daee60084dbc9922e15446be1d395.jpg

  • 8 months later...
wilderness5 New Member

wilderness5

Posted
Posted

Lasted a Mine did same thing. The drain is in the worst place too .  Dealership drained but only lasted a day. What a crab box design . Still having problems sad to say.  I read to replace the cabin airbox every 2 weeks to prevent issues. Smh 

Has anyone else have ongoing issues? Best solution?  Anyone ? 

wilderness5 New Member

wilderness5

Posted
Posted

Lasted a Mine did same thing. The drain is in the worst place too .  Dealership drained but only lasted a day. What a crab box design . Still having problems sad to say.  I read to replace the cabin airbox every 2 weeks to prevent issues. Smh 

Has anyone else have ongoing issues? Best solution?  Anyone ? 

  • 11 months later...
tgsz New Member

tgsz

Posted
Posted (edited)

It's honestly not even there any more in the 2023+ Yukon, the spot in the diagram that shows the drain is smooth on this firewall.

 

Does anyone have updated schematics for where the condensate drain is now?

 

Tore apart the lower part of the dash on both driver and passenger side, zero drain lines visible from the heater core or blower on the transmission hump or firewall.

 

I sprayed a bunch of AC evaporator cleaner in the top vents and it seems to be draining out somewhere above the transmission on the driver side.

 

IMG_20250420_134653.jpg

Edited by tgsz
  • 1 month later...
newdude Senior Enthusiast

newdude

Posted
Posted
1 hour ago, Derek Brendel said:

Anyone have a pic or video of a 2023 custom 2.7 location for this drain?

 

 

Same exact location.  Engine will not affect where the drain is other than you might actually see it easier with the 4 cylinder.  

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