While the 2nd gen LT1 was a pretty good motor (nice torque curve) even the '02 LS1 Camaro I had with bolt ons would have trouble with even a mildly built Duramax.
That's one thing they really didn't think about. You can get a domain name for $15 or less a year. Get a basic hosting plan for $5-10 a month and get 10gigs or more storage and do it on your own.