.035 according to my truck and according to the local parts dealer here in Ohio
should say on the emissions sticker that is somewhere in the engine compartment or the underside of the hood.
A 2009 Chevrolet Silverado with the 5.3 engine requires a .040" spark plug gap.
The 1998 Chevrolet Silverado V-8 engine spark plug gap is .031. Most spark plugs come pre-gapped from the spark plug manufacturer.
2006 Chevrolet Truck Silverado 1500 2WD 5.3L SFI HO 8cylThe Spark Plug Gap.040 (In thousandths of an inch)
.045
0.060 inches
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).
The spark plug wires connect in the 7,3,5,1, 8, 6, 4, 2 order on the 350 motor for the Chevrolet Silverado made in 1990. This changes in the models built after 1990.
2004 Chevrolet Truck Silverado 1500 2WD 5.3L SFI 8cylThe Spark Plug Gap.040 (In thousandths of an inch)
2003 1500 Series 2wd Chevrolet Sylverado 5.3L Engine. Spark plug gap for this engine is .040.
3ed spark plug from the front on the drivers side head. Last plug in the back.
Listed in your owner's manual and under the hood on a placard. 0.060 inches.
0.060 in