Listed in your owners manual and on a placard under the hood.
The diagram.
0.45 inch
theyre pre gapped otherwise it depends on engine specification
Spark plug gap chevy ls blazer
4.3? Follow the spark plug wires from the spark plugs, they will lead you right to the distributor.
.60
.60
gap is .040
the gap is 0.060 inches
You need a 5/8" spark plug socket.
Follow the spark plug wires, they will lead you right to them.
06.0 on a 4cylinder 2wd s10