The plugs looked new when I checked a couple so I just did the wires. From what I've been reading, the P0300 code could be any of a number of little things so it could be a pain in the butt to figure out. I don't want to spend too much money replacing things that might not be bad.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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