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In a bid to wrest the environmental advantage from rival Toyota Motor Corp., General Motors Corp. is preparing to offer a gasoline-electric hybrid engine in its full-size Chevy Tahoes and GMC Yukons beginning in the 2007 model year.
The move, expected to be announced as early as Thursday, represents a shift of the No. 1 automaker's alternative-vehicle strategy from smaller cars and SUVs to what GM's group vice president for global powertrain, Tom Stephens, calls "the highest (fuel) consuming vehicles, such as buses, full-size pickup trucks and sport utility vehicles."
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preliminary GM studies estimate that the full-size hybrid SUVs under development could reduce fuel consumption by as much as 35 percent compared to traditional V-8s, far more than the fuel saved in a Saturn Vue hybrid.
If those numbers are even close -- effectively jumping to a combined 21.7 mpg from 16 today -- the effort potentially could answer Detroit's critics and re-frame the national debate on automotive technology and fuel efficiency.
