Question about 1999 Chevrolet C1500
You may have a bad coils or coil boots in those cylinders, try switching the coils to a good cylinder and see if the codes change to the other cylinders, if they change then replace the coils, the computer see it drawing more cuurent so it thinks its the plug because its not misfiring or completly grounding out.
Posted on Aug 20, 2010
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Posted on Jan 02, 2017
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