Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
i'm positive. When I changed the plugs and the wire I did it one at the time. I first removed the old plug then replaced a new one then change the wire. then I proceed to the next plug ..and so on.
These vehicles have a problem with the catalitic converters going bad and it is likely the problem. You can test this by removing the exhaust and taking it for a little drive. Pic below,