GMC Sierra 2020 running costs in Canada
Official Natural Resources Canada (NRCan) figure for the 2020 GMC Sierra: 9.1–12.9 L/100km, 245–303 g/km CO₂. At Canada prices (CA$1.75/L petrol), driving 15,000 km a year costs about CA$3,386 — CA$0.23 per kilometre.
Official figures — 2020 GMC Sierra
| Fuel types | Petrol · Diesel |
|---|---|
| Official consumption | 9.1–12.9 L/100km |
| CO₂ (official) | 245–303 g/km |
| Configurations in source data | 2 |
| Data source | Natural Resources Canada (NRCan) |
What it costs to run in Canada
| Petrol (12.9 L/100km) | CA$3,386/year |
|---|---|
| safety inspection | CA$0.00/year |
| Estimated annual running cost | CA$3,386/year ≈ CA$282/month |
Assumes 15,000 km a year and the current average Canada prices shown above (CAA national average, Sep 2026 (174.9c)). Insurance is not included because it depends on your age, history and the policy — add it in the full ownership calculator. Servicing, tyres and repairs also vary by car and driver.
How it compares with other petrol cars in Canada
The average petrol car in our Canada dataset uses 11.7 L/100km. The 2020 GMC Sierra uses 12.9 L/100km — about 10.3% more than that average, or roughly CA$315 extra a year at 15,000 km.
2020 GMC Sierra — configurations in the official data
| Fuel | Consumption | CO₂ | Engine | Power | Source variant |
|---|---|---|---|---|---|
| Petrol | 12.9 L/100km | 303 g/km | — | — | 4 trims (representative median) |
| Diesel | 9.1 L/100km | 245 g/km | — | — | — |
Figures are the official certified values recorded in the Natural Resources Canada (NRCan), grouped across 2 configurations. Real-world consumption is typically higher than the certified figure.
Related
GMC Sierra 2019 · GMC Sierra 2021 · GMC Sierra 2018 · GMC Sierra 2022 · All Canada cars · Full Canada running-cost calculator · Canada fuel cost calculator
These are estimates built from official certified figures and current average prices. They are not financial advice. Verify the exact figure for the car you are buying — consumption varies by trim, tyres and driving style.