2025 Gmc Sierra 2500hd At4x Aev. View detailed specs, features and options for the 2025 gmc sierra 2500hd 4wd crew cab 159 at4x at u.s. The automaker has announced the redesigned 2024 gmc sierra 2500 will be offered with two new trims, the at4x and at4x aev edition.

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