Best to replace the plugs with the original equipped AC Delco iridiums. Many of posts over the years about folks having issues when using off brands.

 

Here's a link you might want to bookmark or whatever - https://www.chevyhhr.net/forums/comm...-part-i-48833/

It is broken into several sections including at the start "General Maintenance"- and it lists for spark plugs:
2.2L/2.4L - AC Delco part number 41-103 (iridium)
2.0L Turbo - AC Delco part number 41-108 (iridium)

and the general consensus is to stick with AC Delco - they work, and they work well. You take a chance with other brands so it seems.

 

Yes. I went with the AC Delco 41-103 on my 2.4. Changed them out around 175K and the ones that came out were Original with the engine. I was only changing them as "preventative maintenance" but those plugs last a whole heck of a lot longer than people give them credit for.