2015 Chevrolet and GMC pickups, SUVs to offer eight-speed transmission with EcoTec3 V-8
Green Car Congress
JULY 18, 2014
Chevrolet and GMC have confirmed a new eight-speed automatic transmission will be standard on 2015 Chevrolet Silverado, GMC Sierra and GMC Yukon Denali/Yukon XL Denali models equipped with the 6.2L As with other EcoTec3 engines, it seamlessly switches to four-cylinder operation under lighter loads to improve fuel economy.
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