Horsepower 2024 At4 Gmc 6.6. The 2024 gmc sierra 2500 hd at4x aev edition adds functional style from american expedition vehicles trove of aftermarket accessories in a production package. 2024 gmc sierra 1500 at4 the big news is the duramax diesel engine, with is surprisingly smooth and quiet.
2024 gmc sierra 1500 at4 the big news is the duramax diesel engine, with is surprisingly smooth and quiet. Find information on performance, specs, engine, safety and more.