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p0300 mult cylinder misfire....
I have an 03 1500 silverado, 125000 miles, 5.3V8..... this morning once started it ran real rough, erratic idle, my check engine light flickered many times, but didnt stay on. I checked the codes after driving 25 miles and it had a p0300...which looks like multiple cylinder random misfire......so what to do? Plus are ac delco iridiums, changed about 50,000miles ago, new wires then as well.....
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