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Leaner engines
These 2014 trucks will be both be available with a choice of three engines. There will be a big 6.2-liter V8, a 5.3-liter V8 and a new 4.2-liter V6 designed specifically for truck duty. All three engines will have "active fuel management," which shuts down some of the cylinders when full power isn't needed.
All of the trucks will have 6-speed transmissions, regardless of the engine.
Source: general motors
- Last updated December 13 2012 11:35 AM ET
