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It's hard to beleive that it has been twenty years since I drove off the dealer lot in my brand new 1987 Buick Grand National. I don't think that I will ever forget that day. I had a smile on my face that I don't think I could have hid if I tried. I remember being thrown back in my seat as I...

I pulled the number 6 plug on the GN and noticed about half of the ground electrode is missing. Seems to be broken off, not burnt. Plug is a AC R43TS. Any suggestions before I drive it again? Car has the original unopened motor with 60k miles.