2008 Denali recommended plugs

[Ponchonutty]

My rig has around 80k miles on it now and I think I may have a slight miss when it's cold. Engine runs a little rough and well it could be normal but I thought since it has some miles on it, might just go ahead and change plugs. What is recommended on this? Should I just throw the stockers back in or is there a better choice? I don't feel like spending $18+ per plug either lol!

thanks guys

 

[07Burb]

AC Delco plugs

 

[NORCAL SS]

I Run ngk tr6s. My truck along with customers trucks also. THey are a good plug

 

[Xtremels1z28]

I agree with ^^^^^^^^^^^

 

[Ponchonutty]

K thanks guys

 

[08grey]

Did you end up getting the Ngk tr6. If so how do you like them. What did you gap them at?

 

[Ponchonutty]

No not yet. Little light in the wallet at the moment. Correct me if I am wrong but these iridium plugs I don't think you gap like you use to.

 

[08grey]

The iridium plugs by Ngk i believe come pre gapped vehicle specific. But the tr6 I have read people use different gap sizes. Some 30 some 40.

 

[Tahoe2007BorderPatrol]

I just installed on Tahoe 5.3 AFM Flex Fuel :
ACDelco 41-110 Professional Iridium Spark Plugs gap .040 ( $51.92 on Amazon free shipping )
and
ACDelco 748RR Spark Plug Wire Kit ( $77.70 on Amazon free shipping ) .
Works like a charm
Also for Denali 2008 6.2L V8 .

 

[Ponchonutty]

thanks. Been pretty busy and poor so haven't bought anything yet.