Hey all,
New Chevy owner here. My 2016 Chevy express 2500 has a P0420 code and 170,000 miles. So I figured it was time for a tuneup. I am replacing spark plugs, wires, and coils. I’m using AC Delco for the plugs and wires but the coils are ridiculously expensive. Does anyone have recommendations for a quality coil that won’t cost me an arm and a leg?

 

just leave them alone if they work. Coils aren't a disposable component.
They might last longer than the vehicle.

Moving your question to the van section where it should have been posted.

 

if your engine isn't misfiring and the only code is p0420....coils are not the problem

 

Message received. I will not be replacing the coils. Seems I got bad advice about them. I haven’t done a tune up since the old cap-and-rotor days …on my ‘77 Cutlass Salon.
Thanks guys!!