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Si had these codes and it was a bad pin in the main wire harness .i would highly recommend you test injectors and electrical connections...
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SStanlee83 replied to the thread Cold Start Misfire P050D.Greetings, I’m having the same problem. Did you get a fix for that problem?
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S2016 suburban out of warranty. P050D and P0300 codes stored. Randomly happens on cold starts on typically cold days. CEL lights up then...
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