Clogged AC drain

[newdude]

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.  

[Whitetail5]

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]

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:

 

[wilderness5]

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]

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 ? 

[tgsz]

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.

 

Edited April 20, 2025 by tgsz

[Derek Brendel]

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

[newdude]

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.