The all-new GMC 2015 Yukon, Yukon XL and flagship Yukon Denali models will deliver greater capability and refinement, with more power, new fold-flat rear seats and a quieter interior. And thanks to a new family of advanced EcoTec3 engines, the lineup is expected to deliver one of the segment’s best V-8 fuel economy. Advanced technologies in the 2015 GMC Yukon lineup’s new EcoTec3 V-8 engines deliver more power with greater efficiency; Yukon and Yukon XL feature a standard 5.3L engine, rated at 355 horsepower (265 kW) and 383 lb.-ft. of torque (519 Nm), which enables EPA-estimated 16 mpg in the city and 23 mpg on the highway for 2WD models – efficiency increases of nearly 10 percent on the highway and 7 percent in city driving, compared to previous models. Yukon Denali and Yukon XL Denali models feature an exclusive 6.2L V-8 rated at 420 horsepower (313 kW) and 460 lb.-ft. of torque (623 Nm). No other full-size SUV offers as much power and torque. Denali models are also rated at 15 city / 21 highway (2WD models).
Both of the new EcoTec3 engines feature state-of-the-art technologies, including direct injection, Active Fuel Management (cylinder deactivation), continuously variable valve timing and an advanced combustion system, 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 engines operate in four-cylinder mode longer with Active Fuel Management, further increasing efficiency. A Hydra-Matic 6L80 six-speed automatic transmission is paired with both engines and contributes to efficiency with reduced engine speed on the highway. It also features TapShift control, Tow/Haul mode and Auto Grade Braking.
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