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About to turn 200,000 miles on my '01 2500HD and I'm in the process of replacing plugs and wires. I can find AC Delco wire set for my truck, but as far as spark plugs, I can only find AC Delco Platinum or AC Delco Double Platinum. The plugs I thought were the best for these vehicles are the AC Delco Iridium plugs which I can't find anywhere. I looked at all the major auto supply chains and even Rock Auto and they only have 1 plug left. Is this not the best plug anymore to be running in our units anymore or should I be looking at NGK Iridium plugs as a replacement for the Delcos? Thanks in advance!!!!

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Did you look on Summit or Jegs? And the NGKs aren't bad, I ran them in my 8.1 for a while. I currently have Champions in it, and they don't run any worse or better than the NGKs did

 

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The AC Delco Platinum's will be just fine.

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Posted (edited)

Nothing wrong with running double plats at your mileage. NGK or AC Delco both excellent choices

 

Ebay 41-110 replaces 41-985, IIRC

Edited by txab

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Thanks guys for the responses!!! I'll take your advice and just run the platinums.

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