12-4
Technical Data
Engine
4.3L V6
4.8L V8
5.3L V8
6.0L V8
Engine Drive Belt Routing
V6 Engines
Engine Specifications
VIN Code
X
A
4
G
V8 Engines
Transmission
Automatic
Automatic
Automatic
Automatic
If the vehicle has a diesel engine,
see the Duramax diesel supplement
for more information.
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)