2024 Gmc Sierra 2024 Duramax Specs. Detailed specs and features for the 2024 gmc sierra 3500hd diesel denali ultimate including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine.  — as we can see from these tables, the 2024 gmc sierra hd model with the highest towing capacity rating is the 3500 hd regular cab / long bed drw (dual rear.

 — 2024 gmc sierra ev denali edition 1 vehicle type: See body style, engine info and more specs.