2024 Gmc At4 Hd Specs. For any enthusiasts or prospective customers who may be interested in a 2024 sierra hd, here’s a breakdown of the 15 wheel options gm currently offers for the revised pickup. View detailed specs, features and options for the 2024 gmc sierra 2500hd 4wd crew cab 172 at4 at u.s.

General motors officially unveiled the fully refreshed 2024 gmc sierra hd last october, revealing an updated exterior, an overhauled interior, a new trim level lineup, and powertrain updates. Detailed specs and features for the 2024 gmc sierra 1500 diesel at4 including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain.