GMC Sierra MPG by year

EPA combined, city, and highway gas mileage for every GMC Sierra model year.

Year	Combined	City	Highway
2026	16–25	18	21
2025	16–26	17	21
2024	16–25	17	21
2023	17–26	17	21
2022	16–26	16	21
2021	16–26	16	21
2020	16–26	17	22