Welcome.
I think we might have one or two. A lot of owners are still scared to lose the warranty due to a few lingering issues.
I know PPEI.com offers delete tuning. He's really big in the Duramax market, and trusted.
Unfortunately, the high school kids are the majority doing it. Diesels are getting cheaper to own as they age and more and more are buying them. It will get worse before it gets better..
"ROALING COAL" is cool to them.
Excellent write up/info. As always, the more pictures the better.
I just need the motivation for something like this. I imagine the output is excellent in the housings.
I found this on their forum, but it doesn't really answer if you can have it completely disabled. They have it listed as an option. So I would ASSUME you could have them just disable it.
http://www.greendieselengineering.com/jforum/posts/list/174.page