Glad I found this thread. Count me in as well. I found water on my floor last week and brought it in immediately so I wouldn't get any of that "cannot reproduce" business. They were great and found the service bulletin and "fixed" it right away. The guy said he just added more sealant or something like the bulletin said. Though, he also kind of laughed about it, saying he didn't understand how it would be a permanent fix, and he thought it was a poor suggestion from Chevy.. hm. Guess he was right, or from what you all are saying, he didn't do everything the bulletin suggested. Also, now that I'm thinking about it, I never got any paperwork from them about what they supposedly did.
Either way, I'll be back in tomorrow to show them pictures of the puddle I found today, if it's not still raining.