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1998 C5 correct spark plug

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Old Jan 14, 2024 | 11:10 AM
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Hereispappagray's Avatar
Hereispappagray
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Default 1998 C5 correct spark plug 41-931
I just pulled, from my understanding, the stock spark plugs from my 1998 c5.

ac41-931

the replacement plugs I was given are 41-

i know gm has changed recommendations over the years, but I can’t seem to find clear info.

all stock motor.


Last edited by Hereispappagray; Jan 14, 2024 at 03:14 PM.
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Old Jan 14, 2024 | 03:14 PM
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Hereispappagray
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To close out this thread for other people searching. Early c5 had 41-931 installed since new.

since then GM had updated what plug is recommended based on who producing for them, and what metal type. 41-931 > 41-985 > 41-110> 41-162. All work the same in ls1
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