100.5 mm
0.060 inch
BAD coil, Plug wire or spark plug. Check these things and replace as needed.
0.060 Plug gap.
0.035
.060
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.40 gap
The 1998 Chevrolet Silverado V-8 engine spark plug gap is .031. Most spark plugs come pre-gapped from the spark plug manufacturer.
.035
,030"
0.060
.035