That's what I did, took off the inner door panel and opened that rubber flap, reached my arm in there and sprayed around inside.
My 2008 had just started to get crunchy at the door bottoms. Even though I garaged it at night, it spent most of its life in CT where they use nasty chemicals, salt, and sand on the roads. That's one of the reasons I traded it.Have you seen a 4th gen with rotted out door bottoms?
Get it done now! My dealer told me i waited too long so they wont repair it.You read it right, recently I was cleaning the door jambs and I decided to remove the rubber gaskets on the lower inside of the doors, the ones held on by the plastic push pins, to clean off the gunk and road grime. I was disgusted by what I found. Rust has already taken hold on the metal of the rear driver door. I went to the purchasing dealer for an oil change soon thereafter, and while the salesman couldn't be bothered, he was at least kind enough to point me in the direction of the service manager. The SM kindly went outside with me, and when I removed the gasket, he was surprised by what he saw. He told me that should it "rust thru" during the warranty period, DC will replace the door, rather than try and fix and repaint. He didn't elaborate on what "rust thru" entailed, but my guess is that it will "never be a big enough hole" for them to do anything about it. What would you all do, and what should I document, has anyone had issues on a truck this new before?