Spark plug Champion or AC DELCO

41-156 is the new plug for the LE2 engine. Our 2016.5 got them, and they are fine. 41-123s came out of it.

Plugs need to be AC Delco 41993 (no substitution). I've had misfires with other "equivalent" plugs that went away with the correct plugs.

Only use the factory AC-Delco 41-987 plugs.

Replace those plugs with nothing other than the Champion 7989 plugs. They are about $14 each and they are a 1 piece design.

I paid $42 for the ACDelco iridium plugs, $45 for the ACDelco pro wire set.

GM products run best with AC Delco plugs, just like Ford products run best with Motorcraft or Autolite.

I once had to use 99 cent Champion plugs in my car for a few months when I was flat broke. They worked fine but didn't last long.

Champion plugs are barely adequate for a lawnmower...

I initially got the P0101 code and did the obvious - replaced the MAF sensor. No change, same codes. Goodbye $100.

Champions are crap.