RelayRides, a San Francisco based startup, has just gotten a lot of help.
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Here is final powertrain information for GM's new midsize trucks.
The 2014 Chevrolet Silverado 1500 and GMC Sierra 1500 will be the most powerful trucks on the road, when a new V-8 engine debuts this fall.
General Motors is leaner and meaner, but is it greener?