Verified answer

Buy exactly the AC Delco part number that is in it. There is no such thing as a miracle spark plug, your engine will run the best with exactly what it calls for, and gapped to the spec on the sticker under the hood.

Just go to your local Chevy dealership parts dept & get the plugs. don't even need to worry about gapping them. Never had any problems with spark plugs from the dealership. We use them all the time

it is the quad4 engine. the entire ignition coil assembly is the great conceal sitting on appropriate of the engine. It has 4 coils built into it and that they sit down on appropriate of the plugs. looks like there are 4 bolts that carry it down, and there's a harness going to it.