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Andres

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  1. Andres
    Im new to this mechanic stuff and im not sure wht im doing or how to go about this. I have a 2003 5.3l Silverado. Im using a 2Launch CRP129E scanner and have readings of my 02 sensors. Truck runs like crap, timing is advanced and throttle body says its open at 8%. Trouble codes are: P0135 P0449 P0463 Any advice? Thanks.
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