I read the plugs and I have not seen anything like this. They are red, the electodes and the metal prong that is the ground the arc jumps to. They are some bosch platinum+4's, I know they suck. He put a FP in it today and get this. He returned the plugs for a refund. Lifetime guarantee. Got a set of Delco plugs and a new FP and got $2 change! I will read the plugs again soon, he says its running fine now. I hope it stays that way, I dont want to work on it. Damn chevys, I keep giving him crap about what a ***** it is.