GMC Sierra Mud Terrain Tires 4WD
17.8 MPG The 2026 GMC Sierra Mud Terrain Tires 4WD is EPA-rated at 17.8 MPG combined (16.3 city / 18.8 highway). Over 15,000 miles a year that is about 843 gallons, $2697 a year in fuel, or $0.180 per mile at $3.20/gal.
Across its full 2022–2026 run it averages 17 MPG, improving by 1.8 MPG over 5 model years.
Running cost at different fuel prices and mileages
The figure everyone actually wants, and the one the EPA does not publish — because it depends on a fuel price no agency will commit to.
| Fuel price | Per mile | 10,000 mi/yr | 15,000 mi/yr | 20,000 mi/yr |
|---|---|---|---|---|
| $2.50/gal | $0.140 | $1404 | $2107 | $2809 |
| $3.00/gal | $0.169 | $1685 | $2528 | $3371 |
| $3.20/gal | $0.180 | $1798 | $2697 | $3596 |
| $3.50/gal | $0.197 | $1966 | $2949 | $3933 |
| $4.00/gal | $0.225 | $2247 | $3371 | $4494 |
| $4.50/gal | $0.253 | $2528 | $3792 | $5056 |
| $5.00/gal | $0.281 | $2809 | $4213 | $5618 |
Every model year
| Year | Combined | City | Highway | EPA fuel cost/yr | CO₂ g/mi | Trims |
|---|---|---|---|---|---|---|
| 2026 | 17.8 MPG | 16.3 | 18.8 | $4025 | 537 | 4 |
| 2025 | 17 MPG | 15.9 | 18.9 | $3971 | 536 | 7 |
| 2024 | 16.9 MPG | 15.9 | 18.7 | $3993 | 541 | 7 |
| 2023 | 17.2 MPG | 16.2 | 19 | $3967 | 532 | 6 |
| 2022 | 16 MPG | 14.8 | 18 | $4281 | 568 | 8 |
Where a model year offered several engines or drivetrains, the figure is the average across all EPA-tested trims that year — the trim count is shown so you can see how much averaging is involved.
How it compares in its class
Among the 33 standard pickup trucks 4wd models tracked here, the GMC Sierra Mud Terrain Tires 4WD ranks 14 on current figures, against a class average of 17.1 MPG.
Closest more-efficient alternatives in the same class: Chevrolet Silverado 15 Hybrid 4WD (18), Chevrolet Silverado Mud Terrain Tires 4WD (18), GMC Sierra 15 Hybrid 4WD (18), Ram 1500 Classic 4WD (18), GMC Sierra 4WD (18.5).
Tailpipe CO₂ is rated at 537 grams per mile, which works out to roughly 8.1 tonnes a year at 15,000 miles.
Questions
What MPG does the GMC Sierra Mud Terrain Tires 4WD get?
The 2026 GMC Sierra Mud Terrain Tires 4WD is rated at 17.8 MPG combined by the EPA — 16.3 city and 18.8 highway. Across all 5 model years in the database it averages 17 MPG, ranging from 14 to 23 depending on year and trim.
How much does a GMC Sierra Mud Terrain Tires 4WD cost in fuel per year?
At 17.8 MPG and 15,000 miles a year, it burns about 843 gallons — roughly $2697 a year with fuel at $3.20 a gallon, or $0.180 per mile. The EPA's own published annual figure for the 2026 model is $4025.
Has the GMC Sierra Mud Terrain Tires 4WD become more efficient over time?
Yes. It has gone from 16 MPG in 2022 to 17.8 in 2026 — an improvement of 1.8 MPG, or 11% across 5 model years.
Is the GMC Sierra Mud Terrain Tires 4WD efficient for its class?
It ranks 14 of 33 in the Standard Pickup Trucks 4WD class on current figures, against a class average of 17.1 MPG. That is 0.7 better than typical for the class.
EPA test figures from fueleconomy.gov. Cost per mile and annual fuel spend are computed at a reference price of $3.20 per gallon — use your own price. Estimates based on official test figures and average fuel prices. Real-world consumption varies with driving style, load, terrain and maintenance.