2024 At4 2024 Duramax Specs. Detailed specs and features for the 2024 gmc sierra 1500 diesel at4 including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type,. Detailed specs and features for the 2024 gmc sierra 2500hd including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders,.
Initially introduced on select trims, the lzo duramax diesel is now the base. Duramax’s are easy on oil.