I've bought Superchips for a couple of my trucks: 2004 Chevy Duramax, 2007 GMC Duramax, 2004 Dodge Cummins and now my Chevy Suburban 8.1L Gasoline. ALL were amazing! I have had to call support in the past and they have been there, always helpful, always there to help! All of these devices have exceeded my expectations. Raised on my GMC Duramax, with big 37" wide off-road tires, I still got 28mpg on the freeway while doing 65mpg with my cruise control, and this chip turned the powerful engine into a MONSTER! It could burn rubber in 3rd gear and was still burning 28mpg on the freeway when not pedaling (I don't work for them and the company hasn't influenced me in any way) This is a reliable company (poor reviews) .You're probably reading about people having problems everywhere) Jake
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