Listed under the hood on a placard and in the owner's manual.
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.
It is on the driverside head up front by the #1 spark plug.
.035
.045
5.7l & 7.4 = .60
The spark plug gap is listed in your owners manual and under the hood on a placard.
passenger side third spark plug back Driver side ?
0.060
the Chevy 5300, 2003 and other v8 built in that year the spark plug gap should be set at .060
A wiring plug diagram for 2003 Chevy Cavalier spark plug wires is located in the service manual. The Manual can be bought from an auto parts, the dealer, or some libraries.
.60