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Had my truck in for re-flash for the regeneration problem. Unfortunately it did nothing to help. Had the knocking issue again yesterday under regen. I guess I'm going to just drive it till they come out with a true fix or it blows up. Not happy.
 

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The second part of the TSB is that should the re-flash not work, they then replace the valves in the left side head. I would go back to dealer and tell them the re-flash not work.
 

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I would drive it for a while and see if it clears up. Its not like you have a regen every day so it could possibly take a while.
 
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