2025 Chevy Duramax 2025 Diesel Mpg. Current truck is a 2014 duramax with the 6 speed. We take a trip in the 2025 chevy silverado hd to see how it drives and the mpg.

Looking at a new 2025 at4 and just curious if the 10 speed transmission helps with mpg. And it comes with an optional diesel engine: