LOS ANGELES – The 2008 GMC Yukon Hybrid, featuring the world’s first two-mode hybrid propulsion system in an SUV, will offer consumers a 25-percent improvement in overall fuel economy when it arrives at dealerships toward the end of next year.

By utilizing innovative hybrid technology and Active Fuel Management™ cylinder deactivation technology, the Yukon Hybrid will deliver a spectacular combination of fuel efficiency and power, while maintaining the capabilities of a full-size SUV.

“GMC has always stood for engineering excellence, so we’re extremely proud to be the first to market with a two-mode hybrid SUV to further improve our segment-leading fuel economy while providing all the performance you expect from GMC,” said John Larson, general manager, GMC.

The GMC Yukon Hybrid is powered by an aluminum small-block Vortec V-8 engine that maintains important performance attributes of full-size trucks, such as towing at 6,000 pounds. To offset the added weight from the hybrid propulsion system, GM redesigned certain vehicle components to optimize aerodynamics. These design changes include a new hood, front and rear fascias and a sleek GMC grille.

While traditional full hybrid systems offer only one electric mode that is utilized during low-speed driving, GM is teaming up with DaimlerChrysler and BMW Group to co-develop the two-mode hybrid system, which is a patented fuel-saving technology with one mode for city driving and one mode for highway driving.

The first mode of the system is for low speed and light loads. In this mode, the hybrid system can operate with electric power only, engine power only and any combination of engine and electric power. When the first mode operates as electric only, fuel consumption is reduced in heavy stop-and-go traffic by shutting off the engine for extended periods of time and moving exclusively under electric power at low speeds.

The second mode is primarily used at highway speeds. In addition to electric assist, the second mode integrates sophisticated electronic controls, such as Active Fuel Management, cam phasing and late-intake valve closure, to allow even more efficient engine operation with electric motors less than half the size of a traditional “one-mode” hybrid system. Full eight-cylinder engine power is provided when conditions demand it, such as passing, towing or climbing a steep grade.

The two-mode system also leverages a four-speed automatic transmission and electronic controls in an integrated, powerful and compact system that can be used with gas and diesel engines, front- and rear-wheel-drive configurations and cars, trucks and SUVs.

“The GMC Yukon Hybrid will be equipped with unique powertrain technology that provides a terrific combination of fuel economy, performance and towing capability in a full-size SUV,” said Tom Stephens, group vice president, GM Powertrain. “The Yukon Hybrid’s 25-percent composite fuel efficiency improvement highlights GM’s commitment to save as much fuel as possible by applying hybrid technology to the highest fuel-consuming vehicles first.”

LOS ANGELES – General Motors Corp. will expand the industry's most diverse portfolio of hybrid technologies in 2008 with the debut of its front-wheel-drive, 2-mode hybrid system in the Saturn Vue Green Line SUV, the automaker announced at the Greater Los Angeles Auto Show.

By using this sophisticated hybrid technology, the Vue Green Line 2-mode Hybrid is expected to deliver up to a 45-percent improvement in combined city and highway fuel economy compared with the non-hybrid Vue, based on current federal test procedures.

"We are delivering on our promise to continue our steady rollout of additional hybrid applications, each offering different levels of affordability, fuel savings and performance," said Tom Stephens, GM group vice president, GM Powertrain. "This will be the auto industry's first front-wheel-drive vehicle to use a 2-mode hybrid system, which improves fuel economy while maintaining performance and capability."

The Vue Green Line 2-mode Hybrid SUV will be powered by GM's 3.6L V-6 gas engine, with direct injection and variable valve timing, a nickel-metal hydride battery pack and two active cooled permanent magnet motors.

The front-wheel-drive, 2-mode hybrid system optimizes city and highway fuel efficiency by integrating two electric continuously variable modes with four fixed mechanical gear ratios.

This design is similar to the 2-mode hybrid system for rear-wheel-drive applications, which will debut next year in the Chevrolet Tahoe and GMC Yukon full-size SUVs.

The 2-mode hybrid system improves fuel economy by the following operations:

* Engine off at idle
* Low speed electric-only propulsion
* Electric boosting during brisk acceleration, climbing steep grades or towing
* Cutting off fuel to the engine during vehicle deceleration
* Regenerative braking
* Engine speed and load control
* "The 2-mode hybrid system has the flexibility to improve fuel efficiency across a range of vehicles," Stephens said. "For example, in 2003, we introduced the 2-mode hybrid system for transit buses. In 2007, the Chevrolet Tahoe and GMC Yukon 2-mode full-size SUVs will debut, followed by the Vue Green Line 2-mode in 2008."


By using two electric modes and four fixed gear ratios, the 2-mode hybrid system's electric motors are smaller, compared with traditional "one-mode" hybrid systems, and impose no significant limitation on the size of the engine.

Consequently, the 2-mode hybrid system fits into the same space as a conventional automatic transmission, minimizing packaging, cost and weight issues. The result is exciting performance and outstanding fuel economy.

LOS ANGELES – General Motors Corp. intends to produce a Saturn Vue Green Line plug-in hybrid that has the potential to achieve double the fuel efficiency of any current SUV, the automaker announced at the Greater Los Angeles Auto Show.

This hybrid SUV will use a modified version of GM's 2-mode hybrid system and plug-in technology, a Lithium Ion battery pack when ready, highly efficient electronics and powerful electric motors to achieve significant increases in fuel economy.

"GM has begun work on a Saturn Vue plug-in hybrid production vehicle," said Rick Wagoner, GM Chairman and CEO. "The technological hurdles are real, but we believe they are also surmountable. I can't give you a production date for our plug-in hybrid today. But I can tell you that this is a top priority program for GM, given the huge potential it offers for fuel-economy improvement."

A plug-in hybrid-electric vehicle differs from non-plug-in hybrid-electric vehicles by offering extended electric-only propulsion, additional battery capacity and the ability to be recharged from an external electrical outlet.

The Saturn Vue Green Line plug-in hybrid is expected to offer electric-only propulsion for more than 10 miles. At higher speeds or when conditions demand it, such as brisk acceleration, a combination of engine and electric power or engine power only will propel the vehicle.

In addition to plug-in capabilities and the modified 2-mode hybrid system, the Saturn Vue Green Line hybrid SUV's powertrain will feature Lithium Ion battery technology, two interior permanent magnet motors and GM's 3.6L V-6 gasoline engine with direct injection.

When ready for production, the Lithium Ion energy storage system will be replenished when the battery charge is depleted to a specified level by utilizing the 2-mode hybrid system's electric motors and regenerative braking systems. When the vehicle is parked, the battery can be recharged using a common household exterior 110-volt plug-in outlet.

The 2-mode hybrid system will be altered for use with plug-in technology. It maintains two driving modes – one for city driving, the other for highway driving – and four fixed mechanical gears to maximize efficiency while maintaining performance. In addition, special controls will be utilized to enable higher speeds during electric-only propulsion and maintain electric-only propulsion for longer periods of time.

The Saturn Vue Green Line SUV, featuring the modified 2-mode hybrid system with plug-in capabilities, is part of GM's ambitious effort to offer consumers a broad choice of hybrid systems at various levels of affordability:

* This year, the GM Hybrid system, an affordable belt-alternator starter hybrid technology, debuted in the Vue Green Line front-wheel-drive SUV.

* In 2007, the GM Hybrid system will expand to the Saturn Aura Green Line and Chevrolet Malibu front-wheel-drive midsize sedans.

* In 2007, the 2-mode hybrid system will debut in the Chevrolet Tahoe and GMC Yukon full-size SUVs. Rear-wheel and four-wheel drive will be offered.

* In 2008, the 2-mode hybrid system will expand to the Cadillac Escalade full-size SUV and the Chevrolet Silverado and GMC Sierra crew cab full-size pickups. The Escalade will offer all-wheel drive, while the Silverado and Sierra will offer rear-wheel and four-wheel drive.

* In 2008, the first front-wheel-drive application of the 2-mode hybrid system, will debut – without plug-in technology – in the Vue Green Line. The Vue Green Line will offer customers a choice of the GM Hybrid system or the 2-mode hybrid system.

* In 2009, an electric all-wheel-drive, 2-mode hybrid system will be introduced in the Vue Green Line.

"GM plans to introduce a new hybrid system annually for the next several years, each offering different levels of affordability, fuel savings and performance," said Tom Stephens, GM group vice president, GM Powertrain. "This strategy will allow more consumers to benefit from our hybrid technologies, while providing the opportunity to reduce our country's petroleum consumption."

GM is committed to a comprehensive and cost-effective, three-tiered advanced propulsion technology strategy focused on producing commercially viable and sustainable products. These include alternative fuel vehicles, ongoing improvements to conventional internal combustion engines and transmissions, the electrification of the automobile through a broad portfolio of hybrid models on high-volume car and truck platforms, and commercially viable hydrogen fuel cell vehicles.

General Motors Corp. (NYSE: GM), the world's largest automaker, has been the global industry sales leader for 75 years. Founded in 1908, GM today employs about 318,000 people around the world. With global headquarters in Detroit , GM manufactures its cars and trucks in 33 countries. In 2005, 9.17 million GM cars and trucks were sold globally under the following brands: Buick, Cadillac, Chevrolet, GMC, GM Daewoo, Holden, HUMMER, Opel, Pontiac, Saab, Saturn and Vauxhall.