PHOENIX — When you make big investments in a pickup to improve fuel economy — think Ford's aluminum-body F-150 or the mild-hybrid system on Ram's 1500 — you expect significant results.
So how does General Motors explain shifting to a four-cylinder turbo for its redesigned full-size pickups and getting little gain in combined EPA fuel economy ratings over the previous generation's V-6?
As a work in progress.
link: http://www.autonews.com/article/20181119/OEM06/181119749/gm-chevy-silverado-mpg-4-cylinder-engine