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Trouble code on 06 pickup

Discussion in 'Chevy Trucks' started by QuadRacer041, Jul 31, 2012.

  1. QuadRacer041

    QuadRacer041 Senior Member
    Messages: 140

    As if the problem with my 09 wasnt enough, now I have one with my 06 2500hd crew cab. Got a trouble code po300, misfire. Any ideas on where I should start? Truck seems to run great.
     
  2. GSS LLC

    GSS LLC Senior Member
    Messages: 639

    check plugs and coil first. random missfire, might just be enough to set the light off, not enough to notice in the seat.
     
  3. QuadRacer041

    QuadRacer041 Senior Member
    Messages: 140

    How do i tezt thd coil packs? Truck has about 60k never had a tune up.
     
  4. Plowtoy

    Plowtoy Senior Member
    Messages: 929

    Just like you test a 9 volt battery, stick your tongue on it and have somebody hit the key. If it zaps you, its a good coil (JUST KIDDING, DO NOT DO THAT). You should be able to probe the terminal side to see if there is an open in the loop side of the coil. My suggestion, espically if they've never been looked at is put some dielectric grease in the end of the coil boots. You may just have some carbon trails causing a multiple random misfire, espically under load
     
  5. brad96z28

    brad96z28 PlowSite.com Addict
    Messages: 1,526

    Most commom is performing crank relearn. Fixes all the ones I service.
     
  6. QuadRacer041

    QuadRacer041 Senior Member
    Messages: 140

    Howdo i do that?
     
  7. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

  8. QuadRacer041

    QuadRacer041 Senior Member
    Messages: 140

    How do I do it????
     
  9. brad96z28

    brad96z28 PlowSite.com Addict
    Messages: 1,526

    You will need a fairly good scan tool.