Chevrolet 2013 Express Owner's Manual page 360

12-4 Technical Data
Engine
4.3L V6
4.8L V8
5.3L V8
6.0L V8
Engine Specifications
VIN Code Transmission
X
A
4
G
I n f o r ma t i o n P r o v i d e d b y :
Automatic
Automatic
Automatic
Automatic
Spark Plug Gap
1.52 mm (0.060 in)
1.02 mm (0.040 in)
1.02 mm (0.040 in)
1.02 mm (0.040 in)