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2013 Yukon Hybrid Delivers 33 Percent Better Fuel Economy Over Non-Hybrid Models

May 30, 2013
2013 GMC Yukon Hybrid

2013 Yukon Hybrid Palm Springs

2013 GMC Yukon Hybrid

With an EPA-estimated 20 mpg in the city, GMC Yukon Hybrid and Yukon Denali Hybrid delivers a 33-percent improvement in city driving when compared to non-Hybrid models, and up to 66-percent better city fuel economy than other full-size SUVs.  It also offers the spaciousness and versatility drivers and families in Palm Springs seek in a full-size SUV.

The 2013 GMC Yukon Hybrid and Denali Hybrid achieve their fuel economy in part by using an Electrically Variable Transmission (EVT).  The key to GM’s EVT is its unique assemblage of two 60 kW electric motors, three planetary gearsets and four traditional hydraulic wet clutches. This arrangement allows continuously variable operation, and provides four fixed gear ratios with operation comparable to that of a standard electronically controlled automatic transmission.

A sophisticated Hybrid Optimizing System constantly receives torque-based data from the powertrain and other vehicle systems, and then determines the most efficient means of propelling the vehicle either via electric power, gasoline engine power or a combination of the two.  The EVT is like having two transmissions in one, continuously variable drive for light-load conditions and fixed-ratio drive for high-load situations.

A 300-volt nickel-metal hydride Energy Storage System (ESS) provides power to the EVT’s two electric motors. This battery pack is located under the second-row seat, where it takes up virtually no additional space and does not interfere with second- or third-row ingress/egress. The fold-and-tumble capability of the second-row seat remains and flipping the seat forward provides a flat load floor from the liftgate forward to the front seats.

In addition to supplying power to the EVT, the ESS also provides power to the air conditioning compressor and the Accessory Power Module (APM), which converts the high-voltage supply to 42 volts for the electric power steering system, and 12 volts for the vehicle battery and other 12-volt electrical accessories. Battery pack durability and reliability are maintained via optimized charge and discharge cycles, as well as a dedicated cooling system that draws air from the passenger compartment. As part of the vehicle’s emission control system, the ESS is warranted for eight years/100,000 miles.

Engineers chose the Vortec 6.0L V-8 gasoline engine for the Yukon Hybrid because of its favorable torque characteristics.  This is especially important because GM engineers adapted the 6.0L V-8 to operate with late intake valve closing for reduced pumping losses and better overall fuel economy. Using flat-top pistons, cylinder heads borrowed from GM’s 5.3L high-output V-8, the Vortec 6.0L V-8 produces 332 horsepower at 5100 rpm and 367 lb.-ft. of torque at 4100 rpm, yet requires only regular unleaded fuel.

The Vortec 6.0L also features continuously variable valve timing to control late intake closing, as well as Active Fuel Management, which allows four of the eight cylinders to be shut off during periods of light load.  With the benefit of electric boost, the engine is able to stay in V-4 mode for longer periods in the Yukon Hybrid.

Always safety-minded, the 2013 Yukon Hybrid has a strong body structure to absorb crash energy and provide a protective “safety cage” around occupants.  Standard head curtain side air bags with rollover protection are featured for all seating rows, while standard seat-mounted side-impact air bags for driver and right-front passenger provide thorax and pelvic protection.

Additional safety features include StabiliTrak electronic stability control system.  StabiliTrak helps reduce the risk of rollover crashes by keeping the vehicle in the driver’s intended path by applying throttle, braking or a combination of both.  Standard Ultrasonic Rear Parking Assist can detect certain stationary objects behind the vehicle and send an audible warning alert, adding to the rearview camera system which is standard and designed to provide the driver with a view of people or objects behind the vehicle.  Standard four-wheel-disc brake system with ABS features smooth, quiet operation, longer pad life and more resistance to brake pulsation, while pretensioners minimize forward movement during a collision and are standard on the front safety belts.

Fuel economy, performance and safety help define the 2013 Yukon Hybrid and Yukon Denali Hybrid.  Adventurous families in Palm Springs can enjoy all the Coachella Valley has to offer.

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