Just did my 200K sparkplug change
CF Veteran
Joined: Feb 2012
Posts: 1,428
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From: nebraska
twist and pull...hard to explain but I like using a pry bar to get the wires off, use keep light force up/out on the wire and wedge the bar in, unless they tear I can usually get all 8 off within 5min.....Ive also done a set or 2 
Super Moderator
Joined: Mar 2011
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that's the thing with irridium plugs, they don't show wear....doesn't mean they should not be changed.
CF Veteran
Joined: Feb 2012
Posts: 1,428
Likes: 0
From: nebraska
I never recommend anything other than delco plugs for a GM....platinum or iridium is up to you but if its my choice delco iridiums or nothing. I've seen to many aftermarket "super spark plugs" cause misfires and idle issues, not to mention the just all around run better with delcos. Just my opinion
Thread Starter
CF Senior Member
Joined: Aug 2006
Posts: 535
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I bought the splitfire plugs back in the day, and did not see any improvement that they claim, lol. I just feel like they were a gimmick just like the E3 plugs. I will only use OEM in all my vehicles.
Administrator
Joined: Apr 2008
Posts: 7,573
Likes: 47
From: Austin, Texas
I never recommend anything other than delco plugs for a GM....platinum or iridium is up to you but if its my choice delco iridiums or nothing. I've seen to many aftermarket "super spark plugs" cause misfires and idle issues, not to mention the just all around run better with delcos. Just my opinion