SSV Special Service Vehicle?
which will fi nally be available as a 4x4 Po- lice Package in addition to the RWD Police Package and the 4x4 Special Service Pack- age.
New, Direct Injection Engines For 2014, the Silverado gets three all-new truck engines: 4.3L V6, 5.3L V8 and 6.2L V8. T e engine displacement for the new engines is the same as the old engines; how- ever, the three new engines are totally dif- ferent. All these engines are overhead valve, pushrod truck engines designed for maxi- mum torque at lower rpms as opposed to high rpm-oriented, car-based overhead cam engines. Each new engine has the latest three gaso-
line engine combustion technologies, hence the name EcoTec3. These are Variable Valve Timing, Direct Injection and Active Fuel Management (cylinder deactivation). Both Variable Valve Timing and Direct Injection increase overall torque, fl atten the torque curve, and lower the rpm at which peak torque occurs. For example, the 355 hp 5.3L V8 pro-
duces the same torque at 2000 rpm as a similar, competitive V8 without these tech advances has at 3250 rpm. Torque is more important than horsepower when it comes to fuel economy. T e more usable torque in the normal rpm range, the more often cylinder deactivation can occur. T e more frequent the cylinder deactivation, the bet- ter the actual fuel economy. More torque allows cylinder deactivation under a wider variety of normal driving conditions. T e new 285 hp, 4.3L V6 is standard on
The new EcoTec3 V8 engines like the 5.3L V8 have three important technologies: Variable Valve Timing, Active Fuel Management, and now Direct Injection. The result is more horsepower, more torque, and better fuel economy.
POLICE PICKUPS T
oday, pickup trucks make up 6 percent of the police fl eet. These are all either special- service package trucks (Ford F-150, RAM 1500) or work-truck package trucks (Chevy
Silverado). A pursuit-capable, police package truck is not available from any automaker. Of course, many of these in-service pickups are front-line, patrol vehicles and are driven aggres- sively, but all are speed-limited to around 100 mph. Pickups offer roominess and durability simply not found in any police sedan. They offer
haul options not possible with any SUV. As such, the police use of pickups would double if a police package were available. If or when the Silverado SSV is announced, expect it to be based on a 1500, ½-ton Crew-
Cab 4x4. We can look to the Tahoe PPV to see the Special Service Vehicle components to expect: a high output alternator, auxiliary (isolated) dual battery, vinyl fl oor covering, center (20 percent) front seat delete, cloth front and vinyl rear seats, column-mounted gear shifter, and mappable steering wheel controls.
most Silverado trucks, including the Crew Cab. T e new 355 hp, 5.3L V8 and new 420 hp, 6.2L V8 are optional. Do not even think about getting the 4.3L V6 for any kind of police use. In a 4x4 Crew Cab, it just doesn’t have the power. All Silverado pickups use a 6-speed automatic trans. All three engines are E85-capable, fl ex-fuel cer- tifi ed.
Cylinder deactivation technology uses oil
pressure to deactivate hydraulic lifters on selected cylinders. Deactivating the valves closes the cylinders and saves fuel. Under light loads and steady throttle, the V8 en- gine becomes a V4 engine. When more power and torque is needed, the system ac- tivates (opens) the shutoff cylinders in less than 20 milliseconds. T e transition back and forth between deactivated and activated is imperceptible to the driver.
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