2026 · Midsize & Large SUV · Diesel
2026 GMC Yukon Diesel MPG & fuel economy
The 2026 GMC Yukon Diesel is a midsize or large SUV offered in 2 EPA-rated configurations. The most efficient version returns 23 MPG combined (21 city / 26 highway) on diesel. Across the lineup, combined ratings range from 22 to 23 MPG. Efficiency is unchanged from the 2025 model. Among 91 midsize & large SUVs rated for 2026, it ranks 52nd for lowest fuel cost. At 15,000 miles a year with $3.70/gal diesel fuel, it costs about $2,413 a year to fuel.
What will it cost you?
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Fuel average
The 2026 GMC Yukon Diesel's fuel average is 9.8 km/L (10.2 L/100 km), or 23 MPG combined: 8.9 km/L in the city and 11.1 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 21 | 8.9 | 11.2 |
| Highway | 26 | 11.1 | 9.0 |
| Combined | 23 | 9.8 | 10.2 |
How it ranks among 2026 Midsize & Large SUVs
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
Yukon Diesel MPG across model years
Full history →2 EPA-rated configurations
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| RWD · 3.0L 6-cyl turbo · 10-speed automatic Yukon XL 2WD |
Diesel | 21 MPG | 26 MPG | 23 MPG | — | $2,413 |
| 4WD · 3.0L 6-cyl turbo · 10-speed automatic Yukon XL 4WD |
Diesel | 20 MPG | 24 MPG | 22 MPG | — | $2,523 |
Specs (most efficient configuration)
- Fuel
- Diesel
- Engine / motor
- 3.0L 6-cyl turbo
- Transmission
- 10-speed automatic
- Drivetrain
- RWD
- Tailpipe CO₂
- 442 g/mi
- EPA fuel economy score
- 5/10
- EPA greenhouse gas score
- 4/10
2026 GMC Yukon Diesel vs. rivals
Compare the 2026 Yukon Diesel
With any other car from any year, including other Yukon Diesel model years. Type a year to jump, e.g. "2015 Accord".
Same year, other powertrains: 2026 GMC Yukon (17 MPG)
Frequently asked questions
What is the gas mileage of the 2026 GMC Yukon Diesel?
Up to 23 MPG combined (21 city / 26 highway); ratings range from 22 to 23 MPG depending on configuration.
What fuel does the 2026 GMC Yukon Diesel use?
Diesel.
What is the fuel average in km/L for the 2026 GMC Yukon Diesel?
The 2026 GMC Yukon Diesel's fuel average is 9.8 km/L (10.2 L/100 km), or 23 MPG combined: 8.9 km/L in the city and 11.1 km/L on the highway.
How much does it cost to fuel the 2026 GMC Yukon Diesel per year?
About $2,413 at 15,000 miles a year with $3.70/gal diesel fuel, or $16.09 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.