I have a 2019 Silverado Z71 Crew Cab with 37K miles. I started smelling a mildew smell roughly 6 months ago (maybe 5K miles back) and I thought it was from some wet boots I left in my truck and it was a very light smell. However, the smell has gotten progressively worse and I can't find any moisture, wet spots or actual mildew that is visible in the truck. During the last cold snap here in KY I did find a spot in the back corner of the rear window where there was some water actually frozen on the inside corner of the window (I took pics to show my Chevy dealership). I tried to put the rear seats down to see if I could see any signs of mildew behind the seats but I guess my seats don't fold down.
The smell only seems to last for about 10 seconds when you first open the doors and get in and it seems to be the strongest when you open the back door on the driver side but when I smell the carpets and smells around the seats in that area I smell nothing after the initial shock of opening the doors and smelling it. I have an appointment with the dealership to have my transmission looked at for the 8th time (I'm at 37K miles) and I have asked them to try to determine where the mildew smell is coming from. I have asked them it if will be covered under warranty and they don't seem very confident. I would have to assume that a mildew smell like this doesn't happen over night and I know in fact that I started smelling it 6 months ago. Any suggestions or thoughts?
