2023 · Full-Size Pickup · Gas / Flex-fuel
2023 GMC Sierra MPG & fuel economy
The 2023 GMC Sierra is a full-size pickup offered in 16 EPA-rated configurations. The most efficient version returns 20 MPG combined (19 city / 22 highway) on regular gasoline. Across the lineup, combined ratings range from 15 to 20 MPG. Efficiency is unchanged from the 2022 model. Among 20 full-size pickups rated for 2023, it ranks 15th for lowest fuel cost. At 15,000 miles a year with $3.10/gal regular gas, it costs about $2,325 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 2023 GMC Sierra's fuel average is 8.5 km/L (11.8 L/100 km), or 20 MPG combined: 8.1 km/L in the city and 9.4 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 19 | 8.1 | 12.4 |
| Highway | 22 | 9.4 | 10.7 |
| Combined | 20 | 8.5 | 11.8 |
How it ranks among 2023 Full-Size Pickups
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
Sierra MPG across model years
Full history →16 EPA-rated configurations
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| RWD · 2.7L 4-cyl turbo · 8-speed automatic Sierra 2WD |
Gas | 19 MPG | 22 MPG | 20 MPG | — | $2,325 |
| RWD · 2.7L 4-cyl turbo · 8-speed automatic Sierra 2WD |
Gas | 19 MPG | 21 MPG | 20 MPG | — | $2,325 |
| 4WD · 2.7L 4-cyl turbo · 8-speed automatic Sierra 4WD |
Gas | 18 MPG | 20 MPG | 19 MPG | — | $2,447 |
| RWD · 5.3L 8-cyl · 10-speed automatic Sierra 2WD |
Flex-fuel | 16 MPG | 20 MPG | 18 MPG | — | $2,583 |
| RWD · 5.3L 8-cyl · 10-speed automatic Sierra 2WD |
Gas | 16 MPG | 21 MPG | 18 MPG | — | $2,583 |
| RWD · 5.3L 8-cyl · 10-speed automatic Sierra 2WD |
Gas | 16 MPG | 20 MPG | 18 MPG | — | $2,583 |
| 4WD · 5.3L 8-cyl · 10-speed automatic Sierra 4WD |
Flex-fuel | 15 MPG | 19 MPG | 17 MPG | — | $2,735 |
| 4WD · 5.3L 8-cyl · 10-speed automatic Sierra 4WD |
Gas | 16 MPG | 20 MPG | 17 MPG | — | $2,735 |
| 4WD · 5.3L 8-cyl · 10-speed automatic Sierra 4WD |
Gas | 15 MPG | 19 MPG | 17 MPG | — | $2,735 |
| 4WD · 2.7L 4-cyl turbo · 8-speed automatic Sierra Mud Terrain Tires 4WD |
Gas | 17 MPG | 18 MPG | 17 MPG | — | $2,735 |
| 4WD · 5.3L 8-cyl · 10-speed automatic Sierra Mud Terrain Tires 4WD |
Gas | 15 MPG | 18 MPG | 16 MPG | — | $2,906 |
| 4WD · 5.3L 8-cyl · 10-speed automatic Sierra Mud Terrain Tires 4WD |
Gas | 15 MPG | 19 MPG | 16 MPG | — | $2,906 |
| 4WD · 5.3L 8-cyl · 10-speed automatic Sierra Cab Chassis 4WD |
Gas | 15 MPG | 17 MPG | 16 MPG | — | $2,906 |
| RWD · 5.3L 8-cyl · 10-speed automatic Sierra Cab Chassis 2WD |
Gas | 15 MPG | 18 MPG | 16 MPG | — | $2,906 |
| 4WD · 6.2L 8-cyl · 10-speed automatic Sierra 4WD |
Gas | 15 MPG | 19 MPG | 17 MPG | — | $3,485 |
| 4WD · 6.2L 8-cyl · 10-speed automatic Sierra Mud Terrain Tires 4WD |
Gas | 14 MPG | 17 MPG | 15 MPG | — | $3,950 |
Specs (most efficient configuration)
- Fuel
- Regular gasoline
- Engine / motor
- 2.7L 4-cyl turbo
- Transmission
- 8-speed automatic
- Drivetrain
- RWD
- Tailpipe CO₂
- 446 g/mi
- EPA fuel economy score
- 4/10
- EPA greenhouse gas score
- 4/10
2023 GMC Sierra vs. rivals
Compare the 2023 Sierra
With any other car from any year, including other Sierra model years. Type a year to jump, e.g. "2015 Accord".
Same year, other powertrains: 2023 GMC Sierra Diesel (26 MPG)
Frequently asked questions
What is the gas mileage of the 2023 GMC Sierra?
Up to 20 MPG combined (19 city / 22 highway); ratings range from 15 to 20 MPG depending on configuration.
What fuel does the 2023 GMC Sierra use?
Regular gasoline.
What is the fuel average in km/L for the 2023 GMC Sierra?
The 2023 GMC Sierra's fuel average is 8.5 km/L (11.8 L/100 km), or 20 MPG combined: 8.1 km/L in the city and 9.4 km/L on the highway.
How much does it cost to fuel the 2023 GMC Sierra per year?
About $2,325 at 15,000 miles a year with $3.10/gal regular gas, or $15.50 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.