22 MPG combined won’t win any awards for using less gas, but for the 2024 GMC Yukon XL 4WD with the 3.0L Duramax diesel, it’s a surprisingly respectable figure. This isn’t a compact crossover; it’s a full-size, truck-based SUV designed to haul families, gear, and tow trailers comfortably. Buyers in this segment prioritize space, capability, and durability over outright fuel efficiency, understanding that those attributes inherently come with a certain consumption penalty. The Duramax diesel acknowledges that fuel cost matters, even to Yukon XL shoppers.

City and highway performance

The EPA estimates a fuel economy of 20 MPG in the city and 26 MPG on the highway for this specific Yukon XL configuration. The city number reflects the stop-and-go driving and idling that are inherent in urban environments, which tend to punish larger vehicles more severely. The highway figure demonstrates the diesel’s efficiency when cruising at steady speeds, where its abundant torque allows it to operate at lower RPMs, sipping fuel rather than gulping it. The 10-speed automatic transmission plays an important role here, keeping the engine in its sweet spot for both power and economy.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2024 GMC Yukon XL 4WD 3.0L diesel at $2,550. This calculation is based on driving 15,000 miles per year, using a blend of city and highway driving, and factoring in the EPA’s estimate of the average cost of fuel at the time of the rating. Individual costs will vary depending on driving habits, local fuel prices, and the actual percentage of city versus highway miles driven.

Real-world expectations

While the EPA estimates provide a useful benchmark, real-world fuel economy inevitably varies. Drivers who frequently tow heavy loads, live in hilly areas, or accelerate quickly will likely see figures lower than the EPA estimates. On the other hand, those who primarily drive on the highway at moderate speeds, and who practice fuel-efficient driving techniques, may be able to match or even exceed the EPA’s highway rating. The Duramax diesel is generally known for delivering fuel economy that’s closer to the EPA estimates than gasoline engines, especially when towing.

How it compares

The Yukon XL’s 22 MPG combined rating stacks up favorably against its direct competitors, specifically when considering the 4WD variants. The gasoline-powered 2024 Chevrolet Suburban 4WD with the 5.3L V8 achieves an EPA-estimated 16 MPG combined. A Ford Expedition Max 4×4 with the 3.5L EcoBoost V6 is rated at 17 MPG combined. This makes the Duramax diesel a good choice for those who need the size and capability of a full-size SUV but want to minimize fuel costs without sacrificing performance. For a broader look at all Gmc fuel economy data, consider browsing our full list. And if you’re interested in the performance of other years of this vehicle, see our YUKON MPG across all years.

Tips to maximize efficiency

The diesel engine in the Yukon XL doesn’t need aggressive acceleration to get up to speed. Gentle acceleration from a stop preserves fuel. The diesel’s generous low-end torque means you don’t need to rev the engine high to get moving. Getting to your desired speed more gradually results in less fuel consumed.

On the highway, use cruise control to maintain a consistent speed. This minimizes unnecessary acceleration and deceleration, which waste fuel. Also, be aware of the impact of higher speeds on fuel economy. Driving at 75 mph often consumes significantly more fuel than driving at 65 mph.

Properly inflated tires reduce rolling resistance and improve fuel economy. Check your tire pressure regularly and inflate them to the recommended pressure, found on the sticker inside the driver’s side door. Under-inflated tires create more drag and require more fuel to maintain speed.

Minimize idling, especially during cold starts. Modern diesel engines warm up quickly under load, so it’s generally more efficient to start driving gently than to let the engine idle for an extended period. Excessive idling wastes fuel and contributes to emissions.

When towing, distribute the weight evenly in the trailer and ensure the trailer tires are properly inflated. Uneven weight distribution can create drag and instability, which reduces fuel economy. Regular trailer maintenance also improves safety and fuel efficiency.