2025 3.0 Duramax Specs. The official epa fuel economy ratings were 33/23/27 mph. Gmc recently announced the second iteration of the duramax engine, which will be available on the 2025 installment of the sierra 1500.

Looking over the numbers, we see that the maximum weight a 2025 silverado can tow is 13,300 pounds with a ball hitch and the 3.0l i6 lz0 engine. 2025 chevrolet silverado 1500 zr2 duramax vehicle type: