SOURCE: spark plug gap
oen he hood of the truck there should be a tag on the front of the truck! the tag says catalyst ! engine info ! but the gap should be 060
SOURCE: 2000 Chevy Silverado 1500 with 5.8 liter gas motor
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.
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