Spark Plugs...Help!

By 03HD
November 23, 2005 in 2000-2014 Silverado HD & Sierra HD

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03HD

Posted November 23, 2005

O.K. I need to replace my plugs, but what do I use? Parts store has the AC Delco OE factory plug for $6 each, sparkplugs.com has Denso for $12 or NGK for $7. Is there that much of a difference in performance? Anyone have any good past experience to draw from? Thanks everyone!

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