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tractor mode
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  1. Duramax Second Generation: 2004.5-2005 (LLY)
    Hello, looking for suggestions here. Over a month ago my stock LLY went into the classic “tractor mode” throwing codes P2149, P0202, PO203, PO205, PO208. My first move was to replace injector harness #2 with the AC Delco replacement. This got the truck up and running instantly. Daily drove it...
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