Gm Duramax Diesel Engine 2025. The 2025 gmc sierra at4x will receive the new 3.0l i6 lz0 turbodiesel duramax as its standard engine, with the current 6.2l v8 l87 gasoline engine as optional. Performance, towing, fuel economy, and more details about the chevy and gmc models with the first.

2025 chevrolet silverado hd 6.6 duramax diesel updated: General motors has announced a customer satisfaction program (n232427750) addressing an issue with the piston oil lubrication valve in certain 2025 model.