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03 Tahoe, 208k miles, engine light flashing, codes P0430, P0302, P0430Pd, P0302Pd?

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Engine light flashing and started running a little rough. Turned around and put in the driveway until I could get these codes. Need help. Thanks Terry from Texas.

Vehicle: 2003, Chevrolet, Tahoe, 4.8L?

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P0302 Misfire number 2 cylinder, When the CK ENG Lt flashes this is for a misfire,Thisn can be from sparkplugs to plug wires.

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I have a 2004 Chevrolet Tahoe the error code p0430, engine light on
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