spark plug ?

[1rado]

Went to the auto parts store to get new plugs their computer said acdelco 41-932(platinum).Decided to call dealership parts department to make sure since I don't have a manual they said I needed acdelco 41-985 (iridium)(dealer stock #12571164) .Plugs are for a 2000 5.3 any body know for sure.Thanks

[Chris97K1500]

Iridium plugs are more expensive and "supposed" to be better than platinum. The iridium plugs I've seen are around 13$ ea. Platinum should work fine, I don't see any benefit of running 13$ plugs! Some people have had problems with the platinum tip falling off and have had better results with the regular plugs which are about 1$ each. Hopefully someone here knows for sure! Chris

[AZ-Z71]

Believe my 99 has Platinum factory plug. Pulled them out the other day, 90,000 miles on them and they still looked brand new. Gaps were a little closer than they should have been. Figured they should have been farther apart????

 

Mine are still good, no lost discs.

[Tweeter400]

I replaced mine at 36000 with champion plugs @ $1 ea and it runs great and gained 1 MPG! Mine were pretty bad though and the gaps were all different!