My 93 takes a .36 inch gap. That's what I was told at the parts store when purchasing new plugs. Call them up if you forgot to get that info. Or do what I did and went online to "Bosch" and found the plug and recommended gap.
35 thousands of an inch
0.060 Plug gap.
.060
.40 gap
0.035
spell check your answer
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
0.060