The automaker told Automotive News it is expecting the 2020 Chevrolet Silverado equipped with its new 3.0-liter inline-six LM2 Duramax diesel engine to return 30-40 MPG when travelling at speeds of 50-60 mph.
GM came up with these figures after performing tests at Indianapolis Motor Speedway earlier this year (winning races isn’t all the Bowtie Brand does at IMS, turns out), which gave it a good idea of what to expect from EPA testing.
While executive chief engineer for the Silverado Tim Herrick promised the diesel truck’s fuel-economy rating would be “extremely impressive,” they may fall short of the rating Fiat Chrysler is expecting for its new 2020 Ram 1500 EcoDiesel. The automaker said last week that it was expecting the truck to have “class leading” fuel economy and GM has yet to dispute those claims, AN says.
For comparison’s sake, the 2020 Ford F-150 with the 3.0-liter PowerStroke diesel is rated at 22 MPG city and 30 MPG highway for a combined rating of 25 MPG.
FCA’s and GM’s new diesel engines are also close in output. The Duramax is rated at 277 horsepower and 460 foot-pounds, while the EcoDiesel makes 260 horsepower and 480 foot-pounds. The F-150’s PowerStroke is rated at 250 horsepower and 440 foot-pounds.
The 2020 Chevrolet Silverado Duramax will go on sale later this year. The engine was not available for the 2019 model year, despite 2019 being the first year for the new generation of Silverado. GM will charge owners the same premium for the diesel engine as it does for the 6.2-liter V8 engine, which costs $2,495 more than the 5.3-liter V8.