2025 Gmc Sierra Hd Specs. See the complete list of 2025 gmc sierra hd updates,. Detailed specs and features for the 2025 gmc sierra 2500hd including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders,.
Select a 2025 gmc sierra at4 and at4x hd to view feature and capability specs on the official site. General motors officially unveiled the fully refreshed 2025 gmc sierra hd last october, revealing an updated exterior, an overhauled interior, a new trim level.