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GMC & IROC-Z
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348 Posts
Discussion Starter · #1 ·
I want to replace the spark plugs in my 02 1500 5.3, it has 65k on clock....so what I am wondering is should i go with the tr55 or the ngk iridium, the plugs seem fine, just trying to maintain and maybe pickup some extra mpg, power etc. Thanks for the input.
 

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807 Posts
i just replaced mine...just got AC Delco plugs from autozone. thats what your truck comes with from the factory anyways, there like $7 each. i also got duralast wires because they didnt have anything else.
 

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orale vato! arriba!
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645 Posts
bosch platinum 4 all the way of course there expensive but yea you already got your plugs.
 

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GMC & IROC-Z
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348 Posts
Discussion Starter · #11 ·
I ran the bosch plat 4s in my IROC-Z and in my Corvette, never buying them again......but hey thats just my opinion. Glad you have had good luck with yours, they work for some ppl, and not for some.
 
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