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First Cadillac 2004 srx northstar 56000 miles.
Can anyone tell me what type of spark plugs to use thanks
Welcome to the forums.
I moved your post to the SRX forums to help you get an answer quicker.
You will want to use OEM ACDelco plugs with I believe to be gapped at 0.50.
Is there a reason you want to change them? they are rated to be good to 100,000 miles.
Those plugs at 56000 miles if it running rough or something it might be something else causing it. Good luck
Autolite or ngk iridiums work great never needed to be gapped.
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