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  1. 11-16 LML Duramax Powertrain
    So this is driving me crazy; I had a shop here in California (yes, full smog check state) replace the 9th injector and a forced regen after a reacurring CEL for the P0420. Also had a oxygen sensor replaced just months before. So, no more light the the "permanent" code won't clear. No lights on...
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