2025 Duramax Specs. Gmc recently announced the second iteration of the duramax engine, which will be available on the 2025 installment of the sierra 1500. Improved styling, an upscale interior, and more powerful duramax engine make the refreshed silverado hd a compelling.
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. Gmc recently announced the second iteration of the duramax engine, which will be available on the 2025 installment of the sierra 1500.
