I have had this misfire problem for a couple years. It started with like #5 misfire, so I would pull the plug and check and just replace. Then a few months later it would be another plug. This has gone on, and I replaced plugs, coils, Distributor Cap & Button, Plug Wires. Then yesterday I started it up and it really was tough and the Service Lite bright! I put my Code Reader and come up with “multiple misfires.” A friend, who works for a Chevy Garage, and I were talking about it - I was thinking low fuel or a possible leak at the Intake; he said he feels that quite possibly I need a new Distributor. Anyone else ever run into this, or any ideas, I really appreciate ideas.