16 MPG combined is what you get when you choose the 2021 GMC Yukon 4WD with the 6.2L V8. No one buys this Yukon expecting Prius-like efficiency. This is a truck for those who prioritize towing capacity, interior space, and a commanding presence. They accept the fuel cost as the price of owning a full-size SUV this capable.

City and highway performance

The Yukon’s EPA estimates break down to 14 MPG in the city and 19 MPG on the highway. The city figure reflects the engine’s thirst during stop-and-go traffic, with frequent accelerations taxing the large displacement V8. The highway number, while still far from stellar, benefits from the 10-speed automatic transmission which allows the engine to cruise at lower RPMs. Expect the highway MPG to fluctuate dramatically with speed; pushing beyond 75 mph will bring those numbers down quickly.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 GMC Yukon 4WD 6.2L at $3,600. This figure is based on driving 15,000 miles per year, with an equal mix of city and highway driving, using the national average fuel price for regular unleaded gasoline at the time of calculation. Your actual fuel costs will vary depending on your driving habits, local fuel prices, and the type of gasoline you choose. Given the engine’s high compression ratio, some owners may opt for premium fuel, further increasing their annual expenses.

Real-world expectations

While the EPA provides a standardized benchmark, real-world MPG often differs. Aggressive driving, frequent towing, and even tire pressure can impact fuel consumption. Owners report that achieving the EPA’s 19 MPG highway rating requires a conscious effort to maintain a steady speed and avoid hard acceleration. In mixed driving, many drivers see figures closer to 15 MPG, especially if their commute involves significant stop-and-go traffic. Towing will have a dramatic effect, potentially dropping fuel economy into the single digits.

How it compares

Fuel economy is rarely a strong suit for large SUVs, but the Yukon’s numbers place it in a specific context. The 2021 Chevrolet Tahoe 4WD with the same 6.2L V8 shares the Yukon’s 16 MPG combined rating. A Ford Expedition with the 3.5L EcoBoost V6 manages a slightly better 19 MPG combined with 4WD, making it a good option for buyers who want similar space with potentially lower running costs. Even the luxury-oriented Cadillac Escalde ESV with the same engine gets the same 16 MPG combined. For buyers strongly considering the Yukon Denali, that Expedition’s gain in fuel economy might justify closer consideration. A buyer looking at Yukon MPG across all years may also consider competing vehicles.

Tips to maximize efficiency

Anticipate traffic flow and avoid unnecessary acceleration and braking. The Yukon’s sheer mass requires considerable energy to get moving, so smoother driving habits will translate directly into fuel savings. Maintaining a safe following distance allows more time to react to changes in traffic, reducing the need for sudden stops.

Keep your tires properly inflated to the manufacturer’s recommended pressure, which can be found on a sticker inside the driver’s side doorjamb. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check tire pressure regularly, especially as temperatures fluctuate.

Reduce unnecessary weight. Hauling around extra cargo inside the Yukon, especially heavy items, puts additional strain on the engine. Remove any items that aren’t necessary for your daily driving, particularly anything stored in the roof rack or cargo carrier, as these also increase aerodynamic drag.

Use cruise control on the highway. Cruise control maintains a consistent speed, minimizing variations in throttle input and helping to optimize fuel efficiency. However, be mindful of using cruise control in hilly terrain, as it can sometimes lead to excessive downshifting and increased fuel consumption. Consider all Gmc fuel economy data.