2024 At4 2024 Duramax Mpg. Sweet spot is between 55 and 62 mph where it just doesn't seem to have to work to keep those speeds. 2024 at4 2024 duramax mpg kiah ruthanne, they still call this engine the l5p generation.
The 2024 chevy silverado hd. Sweet spot is between 55 and 62 mph where it just doesn’t seem to have to work to keep those speeds.