Engine
VORTEC™ 4.3L V6
VORTEC™ 4.8L V8
VORTEC™ 5.3L V8 Flex Fuel
VORTEC™ 5.3L V8
VORTEC™ 5.3L V8
VORTEC™ 6.0L V8
VORTEC™ 6.0L V8
VORTEC™ 8.1L V8
610
Engine Specifications
VIN Code
X
V
Z
T
B
U
N
G
Transmission
Automatic
Manual
Automatic
Manual
Automatic
Automatic
Automatic
Automatic
Manual
Automatic
Manual
Automatic
Manual
Spark Plug Gap
0.060 inches (1.52 mm)
0.040 inches (1.01 mm)
0.040 inches (1.01 mm)
0.040 inches (1.01 mm)
0.040 inches (1.01 mm)
0.040 inches (1.01 mm)
0.040 inches (1.01 mm)
0.060 inches (1.52 mm)