Question about 2004 Chevrolet Silverado 1500 Crew Cab

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Misfiring on a 2004 Chevrolet 1500 silverado

I have recently (this weekend 2/14/09) changed the alternator, spark plugs, spark plug wires on my truck but I am still having problems. The truck is giving a 'battery not charging' read out across the dash as the needle fluctuates between 10-14V. It is misfiring and the lights on the truck are constantly going back and forth between dim/bright. I had a diagnostics done on it and all it says is that it needs a tune-up (after it had been done). Does any one have any suggestions on what this might be?

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  • amehtyst_p Feb 17, 2009

    I have no trouble codes.

  • amehtyst_p Feb 17, 2009

    the check engine light did come on and they are the ones that told me that it was misfiring and needed a tune-up. You can also feel it while driving.

  • amehtyst_p Feb 17, 2009

    AutoZone ran a diagnostics

  • amehtyst_p Feb 18, 2009

    The check engine light came on again so I had another test done on it and the trouble code is P0300. The engine size is 4.8.

  • amehtyst_p Feb 19, 2009

    I'm also getting 'battery not charging' and the battery light on. The alternator was replaced for this reason but the message is still coming on. Do you know what might be causing this?

  • amehtyst_p Feb 24, 2009

    I just replaced the coils in the truck because of the P0300 code that came up with the check engine light but the truck is still running the same and the check engine light is still on. Is there anything else that I can do for this?

  • Anonymous May 07, 2009

    have a check eng light w/ 0332 diagnostic code?

  • yadayada
    yadayada May 11, 2010

    P0300 is a random misfire of all cylinders, you really need to go to the dealer to get this sorted out, it may be that the computer needs a firmware update to the EPROM.

  • yadayada
    yadayada May 11, 2010

    then it is not misfiring, that would blink the check engine light.

  • yadayada
    yadayada May 11, 2010

    what trouble codes do u have?



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Yes the alternator has a problem or the connector to the alt is defective or you have corroded wiring connectors, have the alt tested, have had many customers come in and say they had the alt replaced but always turned out to be the new/rebuilt was no good, one guy got 8 alt's before he got a good one.

Posted on Feb 19, 2009


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