GM spark plugs compatible between 6.0L 5.3L 3.9L?

[pacem]

Are GM spark plugs compatible between 6.0L 5.3L 3.9L engines?

I had some laying around for 6.0L but wonder if they will work for 5.3L or 3.9L (such as buicl Lucerne).

 

[SteveSRT8]

I'm pretty sure they work just fine in a 5.3, but I have no idea for the V6 Buicks...

 

[pacem]

That's what I am trying to determine.

 

[racer12306]

Go to an autoparts site and look up each car and their corresponding spark plug part numbers. I doubt anyone is going to know that off the top of their head unless they are a GM service/parts manager or tech that cares.

 

[pacem]

understood

they don't appear to be the same

 

[eljefino]

Look up an NGK part number for all interested engines then use the NGK website to see if it's just something like one heat range different.