Elizabeth City, NC – The Tahoe is EPA-estimated at 16 mpg in the city and 23 mpg on the highway (2WD) – a nearly 10-percent increase in highway mileage over the previous models and 7-percent greater city mileage.
The 2015 Chevrolet Tahoe’s standard 5.3L V-8 engine, rated at 355 horsepower (265 kW) and 383 lb.-ft. of torque (519 Nm), features state-of-the-art technologies including direct injection, cylinder deactivation, continuously variable valve timing and an advanced combustion system, all designed to make the most of power, torque and efficiency across a broad range of operating conditions.
Improved engine mounts, electronic throttle control, adaptive exhaust systems, improved aerodynamics and other technologies help the engine operate in four-cylinder mode longer with Active Fuel Management, further increasing efficiency.
“If you thought that SUVs could not save on gas mileage, think again,” said Terrance Whidbee of Performance Chevrolet. “The all-new Tahoe offers large SUV customers the most fuel efficient option in Elizabeth City North Carolina.”
A Hydra-Matic 6L80 six-speed automatic transmission is paired with the new 5.3L engine and contributes to efficiency with reduced engine speed on the highway. It also features TapShift control, Tow/Haul mode and Auto Grade Braking.
Advanced combustion system
At the heart of the new EcoTec3 engine family is an advanced combustion system that maximizes the potential of the direct fuel injection system, cylinder deactivation, continuously variable valve timing and other technologies to ensure a strong balance between on-demand performance and real-world efficiency.
The ability to more precisely control combustion also enables the new engine to run with a higher compression ratio, one of the best ways to simultaneously increase power and efficiency.
This increased efficiency can now be maintained over a broader range of operating conditions. For example, when towing a trailer on a steep grade on a hot day, the advanced combustion system can reduce the need to trim back spark advance to control detonation, helping maintain efficiency with confident performance.
Direct injection and Active Fuel Management
The 5.3L’s direct fuel injection system precisely meters fuel directly into the cylinders, helping optimize combustion over a broad range of conditions. An all-new cylinder head design supports the fuel system and it’s complemented by a new, sculpted piston head developed to direct the injector’s fuel spray for better mixing and more complete combustion.
To further enhance combustion, the intake and exhaust valve positions have been switched from the previous Small Block engine design, and the spark plug angle has been revised to move the electrode now closer to the center of the chamber to support optimal combustion.
In certain light-load driving conditions, half of the 5.3L’s injectors quit spraying fuel, effectively turning the engine into a V-4 to help increase efficiency. This cylinder deactivation technology, also known as Active Fuel Management, is standard and uses oil pressure, controlled by the powertrain control module, to deactivate the lifters on selected cylinders, closes the valves for those cylinders, and seamlessly reactivates the cylinders when the driver demands greater power. The transition takes less than 20 milliseconds and is virtually imperceptible.
Additional features on the EcoTec3 5.3L include:
· Weight-saving aluminum engine block
· Efficiency-enhancing oiling system
· Oil-jet piston cooling
· PCV-integrated rocker covers
· “Saw-cut” exhaust manifolds
· Cooling system, humidity sensor and more
Small Block legacy
The first Small Block V-8 was introduced in 1955 – a 4.3L V-8 that was an option in the Suburban. It was rated at 145 horsepower and 238 lb.-ft. of torque. Sixty years later, the new EcoTec3 5.3L Small Block produces 245 percent more horsepower and 61 percent more torque from only 23 percent greater engine displacement.
The new 5.3L is built on a foundation of more than 100 million Small Block engines and four generations that came before it. Engines based on the architecture are typically smaller and lighter than competitors’ engines with overhead camshafts, and typically have lower friction – attributes that can enhance efficiency.
If you have any questions about the new Tahoe Inventory please call us at (252) 338-9100 with any questions! Perry Auto Group has two dealership locations at 1005 W. Ehringhaus St, Elizabeth City, NC, 27909 or 1001 Halstead Blvd Elizabeth City, NC 27909.