This really sucks. My 03 2500HD with almost 300,000 miles doesn't leak. I would expect it from that. It was leaking on the front passenger floor in extreme rain. Turned out the drain in the bottom of the left fender was plugged. It filled up to the HVAC system. I cleaned it out and no more leak. Good thing since it has no space in the garage now. So it goes in the RV shed with the RV and the Jhon Deere. The Jhon Deere has to be in the middle as it will go past the trailer tongue. It's the only way everything fits and the door will close. So I tend to leave the truck outside when the tractor is being used. It's also not a push the button door. So if I will be using it again the next day it's easier to leave it out. I normally don't leave any vehicles outside. But it is fenced and gated rural property and if it is up by the garage you can't see it from the street. So I think it's pretty safe. And it is right under a security camera. Sent from my SM-T510 using Tapatalk