Granted, the wild Hummer-like Graphyte probably isn't a very good look into the company's design future, despite the fact that is cannot be mistaken for anything else but a GMC. However, we have always heard that it's the inside that counts, and that is where the future of GMC lies.
The Graphyte uses a hybrid setup dubbed "Advanced Hybrid System II," or AHS II for short. The system uses A Vortec 5300 V-8 gasoline engine with displacement on demand technology similar to that on Chrysler Hemi-equipped products. That engine is mated to a hybrid engine for a claimed 25 percent increase in fuel economy. The system is already being used on GM hybrid transit buses, and is expected to find its way into GMC Yukons and Chevy Tahoes in 2007.
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