2024 Gmc Duramax 2024 Diesel Mpg Rating. Current truck is a 2014 duramax with the 6 speed. The 2024 silverado 2500 duramax diesel achieved a result of 18 mpg in our testing.
Those most concerned with fuel efficiency should entertain the optional diesel engine, which is rated up to 23 mpg city and 30 mpg highway. The 2024 chevy silverado zr2โs duramax diesel engine has proven efficient, but we werenโt ready for its astonishing best tank of 34 mpg with 826 miles of range!