Why are my spark plugs red

Asked by Oct 31, 2014 at 10:19 AM about the 2008 Chevrolet Silverado 1500 LS Crew Cab

Question type: Maintenance & Repair

1 Answer

425

http://ngksparkplugs.com/tech_support/spark_plugs/faqs/faqread.asp Check the link for spark plug diagnosis.

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