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Detailed specs and features for the 2025 GMC Sierra 2500HD Diesel Denali Ultimate including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders,...

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1 day ago · This pro setup on a 2025 GMC Sierra 2500 Denali features a 4 inch McGaughy’s lift kit, 22 inch OE Concept G21 wheels, and 37 inch Toyo tires for bold stance and enhanced …