Spark plugs Platinum or Iridium

[ill_noiz]

I have a 2005 Yukon 5.3 sle. I checked the owners manual for the oem plug part number of 41-985. When i searched online I read conflicting info of gm putting out a tsb stating to use different plugs. What is everyone using.

 

[Kenny D]

When I do mine, this is what I am going with. Rock Auto states these are original equipment for my 09.
https://www.rockauto.com/en/moreinfo.php?pk=1710962&cc=1442911&jsn=399&jsn=399

 

[ill_noiz]

i see some say use the iridium 41-110 but when i look it up it's not showing as being compatible with my truck. Just the 41-962 double platinum

 

[Kenny D]

i see some say use the iridium 41-110 but when i look it up it's not showing as being compatible with my truck. Just the 41-962 double platinum

Maybe you can call a trusted shop and ask what they would recommend or see what your local dealership would install (most likely the original equipment replacement) so you can get the correct updated part number. Or you can just go with the double platinum, shouldn't have any issues with those.

 

[95escahoe]

When I tuned up my 6.0 Escalade I used the plugs stated in the TSB


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[shofzr]

About 80k miles ago I installed NGK Laser Iridium 1465, I was happy with the plugs so last week decided to go with the same again from Rock Auto.

O6 Escalade LQ9





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[Fless]

My '04 5.3 also came with 41-985s. I inquired directly to ACDelco about the unavailability of those, and this is the response I received:

Regarding your inquiry for spark plug for VIN [cut], we show the correct part number to be 41-962. The 41-985 are discontinued and they do show to supersede to 12621258 which is not available and they are no longer recommended for your vehicle. The engineers have made the change to the new spark plug.

If you have any other questions, please feel free to contact our experts at the ACDelco support center by dialing 1-800-ACDELCO (223-3526).

We appreciate your business.

Regards,

ACDelco Internet Response Team​

 

[Sasquatch]

I have the 41-110`s in my yukon and from what i have read the 41-110`s are the same plug as the 41-985 they just changed the number.

 

[RED TAHOE LS]

My '04 5.3 also came with 41-985s. I inquired directly to ACDelco about the unavailability of those, and this is the response I received:

Regarding your inquiry for spark plug for VIN [cut], we show the correct part number to be 41-962. The 41-985 are discontinued and they do show to supersede to 12621258 which is not available and they are no longer recommended for your vehicle. The engineers have made the change to the new spark plug.

If you have any other questions, please feel free to contact our experts at the ACDelco support center by dialing 1-800-ACDELCO (223-3526).

We appreciate your business.

Regards,

ACDelco Internet Response Team​

Straight from the horse's mouth, can't go wrong here.
David g..........

 

[ill_noiz]

I called my local stealership and they said 41-962. I bought some from Advanced Auto. With the 30%off code I got all 8 for $40 plus a $2/plug rebate. Will only cost me $24 in the end.