Gap on spark plug?

Getting ready to change spark plugs for 04 blazer and using AC Delco Professional plugs but don't know what the gap should be. I've seen .060 and I've seen .045.

What does it say under the hood? I know my 2000 5.3L with platinum plugs it's .060. I bought new AC Delco iridium plugs and they said they were pe gapped to .040-.045 (can't remember exactly) and to leave them alone.

Correct gap is .060.

As said leave the gap alone.
If not gaped right pitch them back and get some more that is.

Always check the newest AC-Delco plug book for the correct plug no and gap.

They make running changes somtimes on plug no and gap.
So always check the ac plug book.