Gmc Sierra 2025 At4. The specs below are for the 2025 gmc sierra 1500 pro 2wd, the sierra 1500 is available in a variety of configurations, the complete details of which can be found on gmc.com. Detailed specs and features for the 2025 gmc sierra 1500 diesel at4 including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain.
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