After more than 18 months of waiting since the product was first announced, Chevrolet finally released official efficiency numbers for the 2020 Silverado 1500 with the all-new turbodiesel 3.0L I-6. Silverado 1500 Duramax fuel economy is pegged at an astounding 23 city/33 highway mpg in two-wheel-drive configurations and 23 city/29 highway mpg for four-wheel-drive trucks,
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