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  1. Diesel
    Does anyone have a stock tune file for a 2.8 duramax. I tuned the truck but I need to tune it back to pass inspection.
  2. Green Diesel Engineering
    I have a 2017 Colorado with the diesel. It just threw a code for the def heater. I have a full exhaust and tune ready to go in. But I'm not sure if the ecm will flash with faults. Anyone have similar issues ?
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