Buying EC1160 - having weight anxiety ...

I thought I'd better chime in on this post. I'm the one that posted that comment on the eagle cap forum. Yes the 03 duramax with the 1160 on it was 800 lbs over the gvw. I believe the gvw was 11,800, it weighed 12,600 on a scale in Washington State. But I'm not the type to carry a lot of extra stuff. The truck was also stock. I've since sold the 1160 and went back to a Bigfoot 3000 series non-slide which is about 1,000 lbs lighter. The eagle cap is a excellent camper, but I like the bigfoot better for several reasons. The Op's truck will handle it without any real problems, I put over 20,000 miles on my truck with a 1160 on the 2003. And yes I am still getting between 9 and 11 with the bigfoot on my 2012 3500 6.0 gas. I averaged 12 with the 03 Duramax with the 1160. I've carried both campers on the 2012 with very little difference in mileage. The 2012 does carry the extra weight better than the 03. That 1160 should weigh about 4300 lbs, and will put any pre 2011 3500 DW truck over it's rated capacity. I would just have it weighed before I bought it if you don't trust the weight as listed on the camper, but eagle cap is a very good company I'd bet it's very close.