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  1. #1

    Default Check engine light

    Over the weekend my '04 2500HD with a 6.0 liter had the check engine light come on.
    I was near an Autozone so I stopped and had them hook up their reader. The code came back as a "radom misfire". Before I take it in to the shop, any ideas what might be causing this? The truck seems to be running fine with a couple times of running rough.

    Thanks,
    Mike

  2. #2
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    Default P0300 random misfire

    to GMTC. A great place to hang out for all things GM.
    The code P0300 indicates a random misfire. If it was P0301 it is occurring on cylinder 1. P0305, cylinder 5 etc. It may be jumping from cylinder to cylinder. Plugs wires, cap, rotor, vacuum leak a whole host of causes are probable. Here is a good link to help you with the troubleshooting. http://www.random-misfire.com/

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