Horsepower 2024 At4 Gmc 6.6. This available engine has the serious power you need for big jobs or big. Detailed specs and features for the 2025 gmc sierra 1500 pro including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain.

And as impressive as it is to clear a quarter. Compare all 2024 gmc sierra 3500 trims in one place.