Which is correct spark plug? 2006 5.3

Discussion in 'Engine & Performance' started by Cmcolfax, Jul 23, 2016.

  1. Cmcolfax

    Cmcolfax Member

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    I keep finding multiple references to two different AC Delco part numbers.

    ACDelco 41-110 Professional Iridium*

    ACDelco 41-962 Professional Platinum

    I'm dealing with the well documented smoky startup, ordered the revised valve cover, gonna clean the TB while I have it off and do the piston soak.



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  2. Bonecollector

    Bonecollector Well-Known Member

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    Iridium cost more but last a lot longer than the platinums, both will work just fine in your truck, swap your wires out when your in there


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  3. Cmcolfax

    Cmcolfax Member

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  4. Bonecollector

    Bonecollector Well-Known Member

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    Don't know why you quoted yourself but either plug will work it's just which one will last longer, iridium will outlast platinum, they both ignite gasoline the same


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  5. Cmcolfax

    Cmcolfax Member

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    Didn't mean to.

    Meant to post that I confirmed the Iridium were only specified for 07+

    Obviously both will work... Just sharing what I learned after asking a question

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  6. Bonecollector

    Bonecollector Well-Known Member

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    All good, which did you decide to go with? Your truck smokes on start up? Have you started tuning it up?


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  7. Cmcolfax

    Cmcolfax Member

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    I went with the 962 Platinum

    I did the piston soak, TB cleaned, new Denso wires, MAF cleaned, revised DS valve cover replacement.

    Mostly better now.

    No more P300 random multiple misfire code.

    Still throwing Evaporative Emission Canister and Knock Sensor codes...

    I'll get to those next.

    Gotta deal with stoopid insurance company from the guy who rear ended my DD Jetta...

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  8. cedens

    cedens Member

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    All i know is the same plug goes on both my 5.3's and my 6.0's

    when i replaced on the 06 some years back the parts guy sold me the hotter plugs, noticed zero differenc