Best spark plugs for a stock 05 yukon 5.3

[Rick tottingham]

Best plugs for a stock 5.3?

 

[iamdub]

Exact replacement AC Delco or NGK. There is NOTHING to be gained with the multi-tipped, split, and/or megasuperultrapaladitanium-tipped gimmick plugs.

 

[mizzouguy]

^^^ this. x2

 

[retiredsparky]

Sometimes the fancy plugs can cause engines to run very poorly. The factory engineers did not use them to design these engines!

 

[Bigmac18]

Ive had good success with NGK stock replacement plugs in the past on my other cars. But stick with stock replacements for a stock engine. Like retiredsparky said, they are engineered for these types of plugs