In a surprising move, the 2021 Chevy Silverado 1500 Duramax diesel will see a big drop in the stated MPG ratings versus the prior year, and nothing significantly changed from the 2020 model. So, what’s up? GMAuthority.com discovered this news after carefully examining the stated MPG numbers for the 2021 models. They noticed a pretty big … Continue reading Worse MPG! 2021 Chevy Silverado 1500 4WD with Duramax sees big drop