Gmc Sierra 2025 Diesel. Diesel engines are known for their efficiency and durability. Detailed specs and features for the 2025 gmc sierra 1500 diesel at4 including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain.

Gmc’s heavy hauler, the sierra hd pickup with the diesel engine, is rated to tow up to 22,500 pounds conventionally or 36,000 with a gooseneck hitch fitted. Diesel engines are known for their efficiency and durability.