Best Spark Plugs for 04 TrailBlazer EXT LS
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?
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.
I have a 4.2L engine.
Tom is right. Iridium spark plugs are superior in life-span and performance
www.rockauto.com, specifies NGK #4344 with a gap of .050
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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