Thread: V 12 original spark plugs
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Old September 10th, 2023, 08:12 PM
atomman atomman is offline
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Default V 12 original spark plugs
What were the original spark plugs used in the GMC 702? I am currently using Autolite 403 plugs. Are there Champion or Delco plugs? Is there a better recommended plug?
atomman
Dan Marx
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