2025 Chevy Duramax Mpg Specs. Current truck is a 2014 duramax with the 6 speed. The new 2025 model year chevy.

Looking over the numbers, we see the 2025 chevy silverado hd with the highest towing capacity is the 3500 hd regular cab / long bed drw (dual rear wheel) model with. Chevrolet has made big improvements to the 2025 silverado hd 6.6 duramax turbo diesel.