2024 Gmc Sierra 2500hd At4x Release Date 2024. 2024 sierra at4x gets duramax diesel power. And we’ll know what they’ll cost as their release date draws near.

The 2024 gmc sierra hd trim lineup, from bottom to top, consists of pro, sle, slt, at4, denali and denali ultimate. Detailed specs and features for the 2024 gmc sierra 2500hd including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more.