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I would only use the OEM plugs. In the case of a Chevy that would be AC Delco. Some will tel you that any plug will work as long as it made for your vehicle. I have learned that's not always true. I put a different them OEM plugs in my 97 Eclipse and they burned up in a week. Then I replaced them with the OEM NGK plugs and never had a problem. Ever since I just stick with what the manufacture puts in it.

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Q: 2004 Chevy Trailblazer recommended spark plugs?
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