2024 Gmc Sierra 2500hd At4x For Sale. The 2024 gmc sierra 2500 hd comes in seven trims — pro, sle, slt, at4, denali, at4x and denali ultimate. Find the best used 2024 gmc sierra 2500hd at4x near you.

Regular cab, double cab and crew cab. View local inventory and get a quote from a dealer in your area.