New GM EcoTec3 engine family for 2014 Silverado and Sierra pickups; direct injection, cylinder deactivation and CVVT
Green Car Congress
DECEMBER 13, 2012
SAE-certified horsepower and torque ratings and EPA fuel economy estimates for the new Silverado and Sierra will be available beginning early next year. To further enhance combustion, the intake and exhaust valve positions have been switched from previous versions, and the valves are now slightly canted toward the cylinder centerline.
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