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Tyler_bland38

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About Tyler_bland38

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  1. It has 163 k miles. Plugs were replaced 3000 miles ago with ac delco plugs as a routine maintenance. The battery is about a year old. Could o2 sensors be a problem ? thanks
  2. I have a 2012 silverado and my check engine light keeps coming off and on. The codes read are c0900- device 1 voltage high(history) c0899- device 1 voltage low(history) p0300- multiple misfire detected (History Mil) p0301- cylinder 1 misfire detected (confirmed) there is a slight rough idle on the truck, and I think that my gas mileage has decreased slightly Does anyone have any idea what my problem could be before I take it to a shop, or start replacing parts
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