With those ratings it's not helping CAFE much either.
Except it is doing an exceptional bad job at CAFE compliance.
Because GM's U.S. sales are based heavily on trucks and SUVs, the company has among the lowest overall fuel economy of any automaker. Only Ford and FCA are worse. However, GM is making some progress. Adjusted average mpg for GM increased from 22.2 in MY 2015 to 23.0 in MY 2017 (preliminary) according to EPA.
2.7L 4-cylinder turbo for Silverado should help GM keep improving. 21 mpg combined adjusted is pretty good for a gasoline powered full size pickup truck. The corresponding unadjusted combined mpg (what CAFE uses) should be around 26-28 mpg.
The light truck CAFE standard for vehicles with footprint 75 sq ft or bigger like Silverado is 25 mpg unadjusted combined from 2019-2021, 26 mpg in 2022, 27 mpg in 2023. 2.7L 4-cylinder Silverado 2WD will easily meet or exceed CAFE requirements for 2019-2022, and probably for 2023 too.
The big question is how popular will the 2.7L 4-cylinder turbo be with truck buyers? Full size pickup truck buyers love their V8s!
Edited by rperez817, 11 October 2018 - 07:47 AM.