22 MPG combined is respectable for the 2021 GMC Yukon 4WD with the 3.0L Duramax diesel. This full-size SUV, able to haul families and tow significant loads, isn’t always known for being efficient. This number shows engineering to get maximum mileage without hurting the Yukon’s main abilities.

City and highway performance

The EPA estimates for the Yukon 4WD 3.0L diesel are 20 MPG in the city and 26 MPG on the highway. The city figure shows the stop-and-go of city driving, where the Yukon’s weight matters. However, the highway MPG shows the diesel engine’s efficiency at steady speeds. The 10-speed automatic transmission is important here, keeping the engine in its best rev range. The diesel delivers torque for cruising and passing without sacrificing fuel consumption. The Yukon isn’t for carving canyons; it’s about comfortably driving highway miles.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 GMC Yukon 4WD 3.0L diesel at $2,550. This is based on driving 15,000 miles per year, with city and highway driving, using national average fuel prices. While this is still a cost, remember this is a large SUV. Yukon diesel buyers will spend more for the vehicle and its diesel fuel, knowing it will pay off in lower operating costs compared to gasoline, especially for those who tow regularly.

Real-world expectations

The numbers look good on paper. Expect changes from the official EPA numbers in the real world. Driving style, terrain, and vehicle load influence fuel economy. Hard acceleration, braking, and idling will lower MPG. Towing heavy loads will have a big impact. Headwinds and hills will also decrease fuel economy. Expect lower MPG in winter, when cold and winter-blend fuel hurt efficiency. But highway driving at reasonable speeds should get you close to the EPA’s 26 MPG estimate. With careful driving, some owners have reported better numbers on long trips. Check YUKON MPG across all years.

How it compares

Compared to gasoline versions, the Yukon 3.0L diesel offers better fuel economy. The 5.3L V8 in the Yukon 4WD gets an EPA-estimated 17 MPG combined, highlighting the diesel’s efficiency. Even the 2.0L turbocharged four-cylinder gasoline engine in competitors like the Ford Expedition only manages around 20 MPG combined in 4WD, still less than the diesel Yukon. In the GM family, the Chevrolet Tahoe 4WD with the same 3.0L diesel gets similar fuel economy. Consider the luxury brands, where the Lincoln Navigator manages around 18 MPG combined. This is important to the buyer because they are using their Yukon to drive across the country.

Tips to maximize efficiency

Use the Yukon’s driver-selectable modes. “Normal” mode is generally best for everyday driving. “Tow/Haul” mode is for towing and will lower fuel economy if used when not towing. Tire inflation is also important. Underinflated tires create rolling resistance, which reduces MPG. Check the sticker on the driver’s side doorjamb for the recommended tire pressure.

Watch traffic and drive smoothly. Avoid hard acceleration and braking, which waste fuel. Keep a steady speed on the highway, using cruise control. Try to minimize hard acceleration into merging onto a long straightaway. This takes practice but will pay off.

Reduce weight in the vehicle. Extra cargo reduces fuel economy, especially in a large SUV like the Yukon. Remove items you don’t need from the cargo area and passenger area. Every pound matters. Owners often treat this as a pickup truck but it’s often just hauling trash.

Plan your trips. Combine errands into one trip to minimize cold starts and reduce mileage. Idling a cold engine uses fuel, so avoid idling. This is when dropping passengers off after a long road trip or arriving at work.

Keep your vehicle maintained. Regular servicing, including oil changes and air filter replacements, keep the engine running well. A clogged air filter restricts airflow, which can reduce fuel economy. Check the owner’s manual for maintenance schedules. Also review all Gmc fuel economy data.