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  1. 06-07 LBZ & LLY Duramax Powertrain
    A little back history: Been in the negative temps for a couple days now and I add power service every fill-up once it gets to 30° at night. Haven’t had any issues this winter yet. This morning on my way into work my truck (07 classic LBZ) threw a CEL and started to bog down a little like it was...