There’s a lot of problems with counterfeit plugs going around, even ac Delco. I used Taylor wires on my 08 YXL Denali and it immediately settled down its rough idle. $89 below is a smok’n price. They’re spec’d for a Vette but 150% sure they fit our truck. Same product & seller from 2014 on Amazon below.
Until your sniffer can detect the fraud & scams recommend only using GM Part Store on Amazon.
https://www.amazon.com/stores/page/..._=cm_sw_r_apin_ast_store_5926SYZ725G05Q79QHJY
Be xtra careful because Amazon will navagate you off the factory store in into counterfeit land. Here’s the iridium plugs you should be using. AC Delco 41-162. They’re good for 50-75k mi.
Amazon may be out so give the big name stores a try like AutoZone or R/A. They’re usually counterfeit free, meaning no mystery codes pop up after 1000 miles.
Also be careful on drivetrain and engine part selection. Some sites don’t take into consideration your YXL is Denali or 6.2L. Double check on the site to see it the part is compatible with an 07 Escalade being that’s what you have, but a debadged version.