Gmc 2024 2024 Sierra 2500hd. The gmc sierra has an automatic transmission. Detailed specs and features for the 2024 gmc sierra 2500hd diesel denali ultimate including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine.
While the denali trim was toppled off its throne as the top trim package in gmc pickup trucks for. — the sierra hds get a revised front fascia with newly available led headlights and taillights with sequential turn signals.