2025 Gmc Duramax Horsepower Specs. More than a pretty face. 2025 duramax diesel general motors announced a revised, more powerful version of the 6.6l duramax diesel for the updated 2025 model year gmc sierra and chevrolet silverado hd.
2025 duramax diesel general motors announced a revised, more powerful version of the 6.6l duramax diesel for the updated 2025 model year gmc sierra and chevrolet silverado hd. A forum community dedicated to chevy and gmc duramax diesel owners and enthusiasts.