Details on GM’s new efficient top-end 8-speed automatic
Green Car Congress
AUGUST 21, 2014
The 8L90, the replacement for the venerable 6L80 six-speed in GM’s lineup, is offered as well as standard on 2015 Chevrolet Silverado, GMC Sierra and GMC Yukon Denali/Yukon XL Denali models equipped with the 6.2L In the 2015 Corvette Stingray, the new 8-speed enables a class-leading 29-mpg (8.1
231 
Let's personalize your content