Gm Code Po420

Code po420 Chevy p0496 silverado after hard starting fueling I got misfire on cylinder number 3 and po420 code which is catalytic

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Chevy silverado code p0455 Trouble code po420: i have a po420 code on my car and i don&... Chevy silverado code p0455: meaning, causes & fixes – autos hub

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P0496 – evaporative emission system flow during non-purge (chevrolet

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