Has anyone had issues with water leaking inside to the passenger side floor? I have a 2012 Volt and I first noticed this issue after a hand wash. The dealership supposedly fixed a clog (something near the firewall I think, I don't have access to the paperwork right now). About a month later I had the same issue after another hand wash. I took it back in and they couldn't find any leaks with their water test. Now, about 5 months later, same thing after some heavy rain, passenger floor was very wet. Car is back at the dealership and they still can't reproduce the problem! Has anyone experienced something similar or have any suggestions? It's incredibly frustrating that I paid for this to be fixed and I'm still having the same problem.