ACTIVE FUEL MANAGEMENT
It’s the key to the remarkable fuel efficiency of the Vortec 5.3L V8 and VortecMAX 6.0L V8
engines. It shuts down four of eight cylinders in low demand situations, such as cruising
on a level highway. But the moment more power is needed, such as during acceleration
or driving uphill, the cylinders are reactivated quickly and smoothly – with no driver input
required. In fact, the transitions are so seamless, they are virtually undetectable.
VortecMAX 6.0L V8 engine.
22
SILVERADO 1500
VORTEC POWER
MORE POWER. LESS FUEL.
It used to be considered a trade-off. Want more power from
your engine, then you better be prepared to use more fuel.
Silverado’s Vortec engine lineup makes that brand of thinking
seem very outdated. The 315 horsepower Vortec 5.3L V8
and 367 horsepower VortecMAX 6.0L V8 engines achieve
a higher output, while realizing meaningful gains in fuel
efficiency. That is thanks in part to Active Fuel Management
TM
technology. And with the increased power output of the Vortec
V8 engines come larger hauling capacities. Equipped with the
available VortecMAX Performance Package, Silverado’s towing
capacity goes all the way up to 4763 kg (10,500 lb.). It makes
for one powerful story: Silverado.
ADVANCED ENGINE CONTROL MODULE (ECM)
The ECM synchronizes more than 100 distinct
engine functions on the Vortec V8 engines, from
spark plug timing to traction control. The ECM
also now includes a rate-based-monitoring
protocol that enhances Onboard
Diagnostics capabilities.
VARIABLE VALVE TIMING (VVT)
VVT optimizes combustion timing by adjusting
the opening and closing of the engine’s intake
and exhaust valves. At high engine rpms, the
valves open sooner to allow the engine to breathe
more freely. At low revs, VVT closes the valves
sooner to reduce the amount of unburned fuel
exiting the cylinder. The result is enhanced
low-end torque and high-end power, as well as
increased fuel efficiency and reduced emissions.
VVT is a feature of the VortecMAX 6.0L V8s.
E85 FLEXFUEL
FlexFuel versions of the Vortec 5.3L V8 engine
are available, enabling them to run on regular
unleaded gasoline or a blend of up to 85 percent
ethanol and 15 percent gasoline. E85 is a cleaner
burning, renewable fuel made from biomaterial,
helping reduce carbon dioxide emissions,
decrease greenhouse gases – and our
dependence on petroleum.
DEEP-SKIRT CAST ALUMINUM BLOCK
How does the VortecMAX 6.0L V8 limit crankshaft
flex, while stiffening the engine’s structure and
reducing vibrations? It’s all thanks to the deep-skirt
engine block design that features 6-bolt main
bearings with cross-bolted bearing caps. The use of
aluminum reduces weight, yet warms up more quickly,
for improved heating and defrost response times.
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