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Momof2withachevy

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  1. Momof2withachevy
    The codes that come up are P0300 and P0449
  2. Momof2withachevy
    Yes check engine light is on and as soon as you try to drive it flashes
  3. Momof2withachevy
    I have a 2001 Chevrolet Silverado 1500 with the 5.3L motor not to long ago it started having a problem to where it won't accelerate past 20mph even if the pedal is to the floor I have replaced the following: -Oxygen Sensors(all 4) -Spark Plugs -Coil Packs -Throttle Position Sensor -Fresh oil change and filter What else could possibly be wrong to make it not accelerate! PLEASE HELP!!!!
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