AC Delco Spark Plug part number?

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Rexxrally

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Sorry if this question is answered in an FAQ or something here in this forum, but I can't find it, if it is:

I have a 2005 Yukon 5.3L. What is the correct part number for the AC Delco Iridium spark plugs for it? I'm getting conflicting answers on other websites.

Thanks for your help.
 

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