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04 GMC Sierra 2500HD 4x4 6.0 V

  #1  
Old 09-23-2007, 10:05 PM
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Default 04 GMC Sierra 2500HD 4x4 6.0 V

Hello all I'm new to the forum .I have a question about my truck.My 04 has 118000 mi.I know that I need a cluster for my Speedo.But my engine light came on ,and off..went to auto zone and the code was 0300"random misfire".Changed all plugs and wires.Cleared computer.Now it stays on all the time.Rechecked all wires-ok.Seems to run alright definitly better than before.#3 plug had a burned off electrode(completely gone). I assume is what started the light coming on in the first place.Please help Thanks

[IMG]local://upfiles/5027/50041B32A4884CD0878C342359F17F3B.jpg[/IMG]
 
  #2  
Old 09-24-2007, 05:42 AM
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Default RE: 04 GMC Sierra 2500HD 4x4 6.0 V

the code needs to be cleared now that the problem is fixed..back to auto-zone!
 
  #3  
Old 09-24-2007, 09:56 AM
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Default RE: 04 GMC Sierra 2500HD 4x4 6.0 V

Thats exactly what i did and it came back up as "random misfire" again.Thats when I rechecked the wires and plugs.They are all ok.I used ac/delco plugs,but all they had in wires were Bosch (7mm) wires.Loooked the same and were same length.Light went off this morning .we will see if it stays off.But thats been the routine.
 
  #4  
Old 09-26-2007, 06:44 PM
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Default RE: 04 GMC Sierra 2500HD 4x4 6.0 V

Well as always the light has come back on but still runs like a champ.
 
  #5  
Old 09-26-2007, 07:33 PM
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Default RE: 04 GMC Sierra 2500HD 4x4 6.0 V

sometimes an injector can "miss" enough to set codes,but not really run ****ty
 
  #6  
Old 09-27-2007, 06:16 PM
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Default RE: 04 GMC Sierra 2500HD 4x4 6.0 V

Now the light is back off again,for how long ,who knows.Thanks Argon

 
  #7  
Old 10-01-2007, 04:16 PM
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Posts: 10
Default RE: 04 GMC Sierra 2500HD 4x4 6.0 V

Well what do know GM sent me a letter onthe cluster for my GMC ,unfortunately 30,000 miles too late,Grrrr.7 years from put into service or 70,000 miles
 
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