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What are the best plugs for a 2004 GMC 5.3 engine?

Updated: 10/21/2022
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Bck1c

Lvl 1
14y ago

Best Answer

In my opinion you can not beat the oem Ac Delco iridium plugs.

I have ran in to problems with most all other plugs in these.

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14y ago
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Q: What are the best plugs for a 2004 GMC 5.3 engine?
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