Gmc Denali Diesel Truck 2025. Edmunds also has gmc sierra 1500 diesel pricing, mpg, specs, pictures, safety features,. The 2025 gmc sierra 1500 denali ultimate is the absolute top rung in the brand’s luxury truck hierarchy.
Available with a choice of engines, it comes in a singular. The check engine light comes on, but after turning off the ignition and restarting it appears to reset itself.