For those who cannot read everything the cliff notes:
2015 Silverados might have faulty body seals which will allow water to get into the dash and floor areas. Chevy says March and newer, mine is a January baby..
The story and more for those who care:
SO... I go outside yesterday to clean the windshield of the TV. As I get done the passenger side I pickup the Windex bottle that had fallen over on the floor... There was a puddle of liquid under it about a 1/4" deep.
So I grumble to myself, curse then begin to clean up the mess with some shop towels. Three towels later and there is still liquid and the area is STILL SOAKED! NOW I AM CONCERNED!! I do the sniff test then a lick test (not recommended for the faint of heart! LOL) and it is just water. So I am glad it is JUST water, but now, why is there a 1/4 of standing water in my truck with only 4000 miles on it.
This morning I went over to the dealer to have them look at it. The area was still saturated and not seemingly drying at all. After they change some seals, remove some panels they come in and let me know I in fact have a water leak.
They report the carper and underlayment are soaked but it is contained to the area on the passenger floor area. The leak is coming in through a body seam that was flawed from the manufacturing process they figure somewhere under the dash, fender or engine compartment. They report that they have a bulletin from Chevy saying to check certain body seals on the Silverados (I do not know it if is only 2500 or the others as well) made after March were not correctly made and will need to be checked and redone if needed. Mine was made in January.. So there goes that idea.
So on Monday it goes in to have its insides taken out to dry and clean, the dash pulled in that area and the fenders pulled. The area on my truck where the issue is was along where the dash trim and rocker panel meet. Right where your right foot would be if in the passenger seat. So check the area out before you get other issues. My guess is that it was always going this but we have just not had a lot of rain and I am not usually under the passenger floor mats to see this mess.