Best Spark Plugs?

[tommybilt]

1997 Sierra 5.7 liter z71 233,000 miles. Best spark plugs for this truck and does anyone know of a good site to buy them?

 

thanks.

[RyanZ71]

I'd go with the AC/Delco Rapidfires available at your local Checker or Pep Boys or Autozone or GM dealer.

[tommybilt]

I'd go with the AC/Delco Rapidfires available at your local Checker or Pep Boys or Autozone or GM dealer.

 

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thanks

[OUMike]

definatly..with spark plugs I think its best to replace with OEM. I've heard a lot of stories about horrible gas mileage, and just poor performance all the way around when switching to those multi-prong platinum ones.