Wet floor on Passenger side

[lancetek]

I've got a 2018 NV 3500 SL.  I've not had it for very long and Ive put less than 8K miles on it.  Currently it has 69K miles.

 

Since I've owned it, off and on the passenger side has wet carpet under the floor mat.  It has no smell and is not sticky or anything.  Seemingly, it's water.  Thequestion is where does it come from?  The dealership has so far been unable to find the cause either.

 

It happens regardless of outside temp, not consistent with rainfall or the van getting wet.

 

Has anyone had anything like this with their NV?

[radin2son]

There were some posts long ago about windshield related leaks. I haven’t had much luck with site searches, but maybe you will. 

[Local Apparent Friday]

Check to make sure the ac drain hose isn't clogged. That is the common cause of this when it's not wx dependent.