.060
0.060
The Spark Plug Gap.035 (In thousandths of an inch)
The spark plug gap for a 1991 Chevy Silverado 2500 V8-350 is .035, according to major spark plug manufacturers (i.e. Autolite, Bosch, Denso, NGK).
On my 1992 350 van it's .35 gap
personally I would use an iriduim plug.
20 ft lbs
.045 inch.045 inch
all of the information I have found to date indicate it should be 0.35
According to the manufacturers specs on the emissions sticker it is .035.
The 1986 Chevrolet 350 cubic inch engine spark plug gap is .027. Most spark plugs will be pre-gapped by the spark plug manufacturer.
AnswerThe spark plug gap is .035 on a 1993 GMC 350 TBI.