Water shows up under mats

[Highway3]

I have the OEM all weather mats (84503128). I woke up to vacuum the car in the morning and found that there was water underneath the front driver and passenger mats. It seemed like a lot of condensation, but only under these mats. The 2nd row was fine, and there was no sign of any moisture anywhere else in the cabin. I'm in California and temps are in the 40s at night.

Anyone else seeing this? Any idea what could have caused this?

 

[B520044]

Maybe the sunroof drain lines?

https://www.tahoeyukonforum.com/threads/21-denali-water-leak.122693/

 

[Chad204]

I had a similar issue in my Avalanche. Ended up being th a/c condensate drain was plugged. If you've been running the Ir conditioning I'd suspect that

 

[drvrd]

I have the OEM all weather mats (84503128). I woke up to vacuum the car in the morning and found that there was water underneath the front driver and passenger mats. It seemed like a lot of condensation, but only under these mats. The 2nd row was fine, and there was no sign of any moisture anywhere else in the cabin. I'm in California and temps are in the 40s at night.

Anyone else seeing this? Any idea what could have caused this?

 

[drvrd]

Your A/C evaporator coil drains are blocked with probably leaf debris and overflowing into the cabin instead. Been there and own those wet carpets. Work the drain debri free from the fire exterior side using a stiff hook end wire.

 

[Bigmanny]

is this the same problem that people have been having with the sunroof drains?

 

[Soulmango]

Your A/C evaporator coil drains are blocked with probably leaf debris and overflowing into the cabin instead. Been there and own those wet carpets. Work the drain debri free from the fire exterior side using a stiff hook end wire.

I know we're talking about newer models, but within the last coupe of weeks this very thing has happened in my 2010.
You mention clearing debris from the firewall exterior side, but is there any way you can "point' to this location a bit?
Thanks for any assistance.

 

[ZeroDark30]

Same issue with mine. Dealership is looking at it tomorrow. Not very confident they’ll solve it…