Ram, Chevrolet and GMC have new diesel powertrains for their latest half-ton pickup trucks, and within the past few months, we’ve put both the 2020 Ram 1500 EcoDiesel and 2020 GMC Sierra 1500 diesel through fuel economy runs. Now, it’s the turn of the 2020 Chevrolet Silverado 1500 diesel over a roughly 1,000-mile, unloaded run. Though the Silverado 1500 and Sierra 1500 share the same turbocharged 3.0-liter inline-six-cylinder diesel engine, they have different fuel economy ratings partly thanks to unique aerodynamic profiles.
The Silverado 1500 diesel is EPA-estimated at 23/33/27 mpg city/highway/combined for 4×2 models and 23/29/25 mpg for 4x4s. The Sierra 1500 checks in at 23/30/26 mpg (4×2) and 22/26/24 mpg (4×4), with the highway figures providing the largest gap. These numbers compare favorably to the diesel half-ton offerings from Ram and Ford, as well.
My test vehicle was a 2020 Silverado 1500 RST double cab with a 4×2 configuration and a $48,685 price tag (including destination charges). The most expensive option was, of course, the diesel engine itself that adds $3,890 to the truck’s bottom line.