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2011 through 2016 Diesel engines with certain injection pumps were suffering failure due to low fuel lubricity. My 2012 Duramax had the pump fail at 82,000 miles. Pushed metal throughout the fuel system, injectors and return to the fuel tank. I believe the pump has been redesigned or replaced with a different manufacturer after 2016. Fords, Dodges and GM all had similar issues. Adding a fuel lubrication additive helps. Howes, Lucas, etc. all help. I purchased extended warranty coverage at the purchase of the truck (new) to mostly cover the electronics on the truck. Who knew the fuel system would fail and be a covered repair. PHEW! Just shiegh of $12,000. repair.
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