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I have a 2007 suburban 5.3. On a trip today the stabilitrak light came on and the vehicle developed a very loud nocking or ticking. It's lost some power had the codes looked up and it showed # 4 misfires has good oil pressure and not low on oil. Changes coil on #4 but still nocking any help or opinions appreciated.
 

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Have you checked the plugs?
 
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