GM: new Sierra 5.3L V-8 EcoTec3 highway fuel economy tops Ford EcoBoost V-6
Green Car Congress
APRIL 1, 2013
V-8 EcoTec3 AFM VVT DI (L83) for Chevrolet Silverado and GMC Sierra. The 2014 GMC Sierra 1500 full-size pickup truck features a new 5.3L 2014 GMC Sierra. EcoTec3 V-8 is one of three more efficient new engines for the Sierra; a 4.3L Sierra also will be available later this year with a new 6.2L Click to enlarge.
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