Chevrolet Silverado Classic 2007 Owner's Manual page 614

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
614
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)