I purchased this gas hog about a year ago. After driving the box from Chicago to Utah I realized that I had just purchased a Big Black Box! I had one hell of a time trying to pass a semi truck on the freeway and was able to get 8 mpg! By the time I made the trip back I was ready to sell it! I then thought to myself, how about a Duramax? I soon did some searches on the internet and was told by everyone including (GM) that it could not be done! So needless to say the next day I pulled the motor, transmission, and transfercase out of the 2003 H2. I then purchased a Duramax diesel engine and Allison transmission. After 3 months we had the conversion complete! (after many wiring issues) This made the H2 one of the funnest vehicles I have ever owned! I was able to get 23 mpg! I then was asked by GM to see the H2 at the 2004 SEMA show. When the Hummer brand team came out to see what we had done at the show, they were amazed! They told me it could not be done and asked me to start it.(like i pushed it there) I then offered to take them for a ride, the team could not belive that we were riding around Las Vegas in a Duramax powered H2! I really hope after this meeting that we will see more Duramax powered or equivlent vehicles in the near future. I hope you find this article to be of value! If you have any questions please let me know! Thank you, Jeremy.
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www.powerplayperformance.com