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  1. 06-07 LBZ & LLY Duramax Powertrain
    Hey guys. I'm new here and hoping to get some help with some issues I've been having wt my 07 classis LBZ (approx 65k miles). About a year ago the check engine light came on but turned of again before I could get it to a dealer. It ran fine so I never took it in. By the third time this...