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  1. 06-07 LBZ & LLY Duramax Powertrain
    Hi Guys, I am a new member with a 06/07 express cut away with a four winds RV. It has an LLY and and Hydromatic. I live in Australia. Love the truck but nobody here knows anything about it. It has done 5000 miles from new and has 3 issues. First -Engine warning light on dash that has been on for...
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