2025 Sierra Denali Ultimate 2025 Specs. Sierra 3500 hd denali ultimate. The sierra 1500 also can be had with adaptive dampers and wheels as large as 22.
Detailed specs and features for the 2025 gmc sierra 1500 including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more. View detailed specs, features and options for the 2025 gmc sierra 1500 4wd crew cab 147 denali ultimate at u.s.