.060
If it's a V6 then it is in the right head by the back spark plug. ............V8..................................................... Front spark plug. This is you standing in the front of engine.
0.060 Plug gap.
It is in the drivers side head by the front spark plug,
It is screewed into the drivers side head, back beside the last spark plug.
.40 gap
0.035
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The 1998 Chevrolet Silverado V-8 engine spark plug gap is .031. Most spark plugs come pre-gapped from the spark plug manufacturer.
.035
0.060 inch
.035
I believe it is 45