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Tahoe PO300 Code

Discussion in 'Chevy Truck Talk & GM News' started by Jbugg, Jul 29, 2011.

  1. Jbugg

    Jbugg New Member

    Could anyone help me with a few issues that I am having with my 05 Tahoe? I have a Random Multiple Misfire code showing on my scanner. I replaced the plugs and plug wires but it still misses. I recently replaced the transmission but I am not sure if that had anything to do with the
    misfires.It was running ok until I replaced the transmission. Does anyone have any Ideals?

    99'HEARTBEAT Epic Member Staff Member 5+ Years ROTM Winner 1000 Posts Platinum Contributor

    Trouble Code....P0300
    may mean that one or more of the following has happened,

    • Faulty spark plugs or wires
    • Faulty coil (pack)
    • Faulty oxygen sensor(s)
    • Faulty fuel injector(s)
    • Burned exhaust valve
    • Faulty catalytic converter(s)
    • Stuck/blocked EGR valve / passages
    • Faulty camshaft position sensor
    • Defective computer
    Also what Brand of Spark plugs did you go with and install???

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