For a 4x4 1500 V8 its .40
Sorry, But the above answer is WRONG. Correct answer is 0.060 Straight out of the book. If you set them at 0.040 then you must remove them and gap them at 0.060 VERY important............
The spark plug gap in your 1999 Chevrolet suburban is dependent upon the type of engine. The standard engine spark plug gap is .011.
A person must leave the right size gap for the spark plugs when changing them. The 1999 Chevy Suburban has a spark plug gap of .060 inches.
.035
.045
5.7l & 7.4 = .60
passenger side third spark plug back Driver side ?
The spark plug gap is listed in your owners manual and under the hood on a placard.
0.060
The recommended spark plug gap for a 2000 Chevy Monte Carlo 3.4 V6 is .060"
on the bottom of the cylinoid valve
Listed under the hood on a placard and in the owner's manual.
it is 37