I tried to find the thread about the rear-bumper seal issue, but it eluded me. Can someone help Julie here? I remember one couple had a big problem with floor rot in the rear due to unsealed bumper. JC eventually replaced the floor. Others had same problem - it was a "good" thread about a bad thing.
I did find this thread about the 2005 model year. Haven't gone through it -
maybe there is something there that will help you.