2025 Gmc Sierra 2025 Duramax Diesel. 2025 gmc sierra 2500 and 3500 hd first look: Gmc recently announced the second iteration of the duramax engine, which will be available on the 2025 installment of the sierra 1500.

Gmc recently announced the second iteration of the duramax engine, which will be available on the 2025 installment of the sierra 1500. This refined engine, slated to come.