2025 Sierra Denali 6.2 62 Inch. Edmunds also has gmc sierra 1500 pricing, mpg, specs, pictures, safety features, consumer reviews. What’s new on the sierra 1500.

 — 2025 gmc sierra 1500 denali ultimate includes: While gmc says the estimated combined fuel economy numbers for the sierra denali is 14.3 litres per 100 kilometres, my test of the truck returned an average of 18.0 l/100 km.