That whoever is behind engine design at GM is a sadist.
I’ve never had more trouble changing SPARK PLUGS on any vehicle other than a GM – nor have I ever had a spark plug snap in half on any brand other than AC Delco. I’m doing a basic tuneup on the Silverado as weather permits – had a new exhaust system installed at Monro the other day, tonight I got half the plugs done, they look to be pretty clean considering the blown head gasket they apparently had repaired. No idea what I’m in store for with the passenger side cylinders yet… once I get the plugs, wires, cap, and rotor in – then I’ll replace the fuel filter and finally swap out the oil pressure sending unit. I don’t see the list of repairs getting shorter any time soon, but I’ll take care of the easy stuff first.