Best Spark Plugs for 04 TrailBlazer EXT LS
15

Asked by Oct 14, 2014 at 06:48 AM about the 2004 Chevrolet TrailBlazer EXT LS SUV

Question type: Maintenance & Repair

Is the AC Delco Iridium Spark Plug #41-103 the best one out there for the 04 TrailBlazer EXT LS? Is there others that are just as good?

5 Answers
250,875

answered 2 years ago

I like NGK's, do you have the 4.2L or 5.3L engine? I can't tell based on trim level. But any iridium will do and you won't have to change the plugs for a long time.

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15

answered 2 years ago

I have a 4.2L engine.

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answered 2 years ago

Tom is right. Iridium spark plugs are superior in life-span and performance

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250,875

answered 2 years ago

www.rockauto.com, specifies NGK #4344 with a gap of .050

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answered about a year ago

I have a 2004 trailblazer LT i will like to know what plugs are good for my motor 4.2 liter

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