Wet floor boards

[Sherry Lockhart]

Why my 2020 gmc at4 front floorboards wet driver and passenger

 

[silveradosid]

do you have a sunroof, could be coming from the drains

[Bikerjon]

20 hours ago, Sherry Lockhart said:

Why my 2020 gmc at4 front floorboards wet driver and passenger

 

Is there a sweet smell inside the cab or foggy windshield? Possible heater core leak.

[Sherry Lockhart]

No but there is a terrible smell. Like a sour smell. I'm sure the carpet has milldewed. The passenger side seems to have more water than driver side. Also I've been hearing water moving when I take off or stop suddenly.  

[silveradosid]

if you hear water moving then probably the heater box drain is plugged

[2016 Sierra Owner]

8 hours ago, Sherry Lockhart said:

No but there is a terrible smell. Like a sour smell. I'm sure the carpet has milldewed. The passenger side seems to have more water than driver side. Also I've been hearing water moving when I take off or stop suddenly.  

The water you hear when you take off is water that is trapped in the doors. There are drain slots on the bottom of the doors. If they get clogged the water can't drain out. Get a small wire or screw driver and poke around those slots till the water drains. I heard water in my dads F-150 one day and when I cleared the drain hole it drained for a good minute of water.

[slayer7006]

Ever figure this out? Have the same issue with my 20 silverado.  Driver carpet wet, smells like cat piss everytime it rains...

[brianf60]

As mentioned you need to check the heater/ ac drain. If that is not plugged and you are not using coolant then I would leak check the windshield. Has it ever been replaced?