Gmc 2500hd 2024 At4. The 2024 gmc sierra 2500 hd at4x aev edition adds functional style from american expedition vehicles trove of aftermarket accessories in a production package. The powertrain consists of a 6.6 liter.
The powertrain consists of a 6.6 liter. The first ever sierra hd at4x and at4x aev edition is taking the at4 experience to the next level.