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  1. 11-16 LML Duramax Powertrain
    Earlier this year I dropped $5k on a new dpf system, NOx sensors, and so on. I had purchased the truck used with about 40k on it about a year earlier and added DEF whenever the DIC asked for it. The mechanic who worked on it told me the system may have failed due to running out of DEF in spite...
  2. Alternative Fuels Diesel Additives Lubricants
    Anyone experience problems with this brand?
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