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2022 Silverado 3500 code P249C

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      pmanches54
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      On a 2022 Silverado 3500 with the diesel for the past year I have been repeatedly getting a code and limp mode warning with code P249C. A number of GM dealers have looked into this but can’t find the issue. I have been resetting the code and it goes away for awhile then comes back. The reference to the code has many possibilities, mostly DEF related, but no one seems to know how to find the exact cause and fix. Has anyone else had this same issue? Thank you

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