2019 full-size pickup truck mpg champs: Ford vs. Chevy vs. Ram

2018 GMC Sierra 1500With electric pickup trucks from Ford, GM, and others—including newcomers like Rivian—looking likely to arrive in the next few years, the truck field could be on the verge of a clean, quiet, tailpipe-emissions-free shakeup. That said, you wouldn’t know this segment as being poised on a revolution. Progress in the efficiency and...