The 2023 GMC Sierra 1500 with mud-terrain tires, four-wheel drive, and the 5.3L V8 has a combined fuel economy rating of 17 MPG, which is expected for this type of truck. This truck isn’t engineered for Prius-like efficiency. It’s built to conquer trails, haul equipment, and project a rugged image. Buyers who choose this configuration understand the tradeoff between capability and fuel consumption and prioritize the former.

City and highway performance

The EPA estimates the Sierra at 15 MPG in the city and 19 MPG on the highway. The city figure reflects the inefficiencies of stop-and-go driving, where the truck’s weight and the V8 engine use more fuel. The 19 MPG highway rating suggests that under optimal conditions, consistent speeds and minimal acceleration, the 5.3L V8 coupled with the 10-speed automatic transmission can achieve respectable fuel economy. Remember those mud-terrain tires were designed for off-road grip rather than low rolling resistance. They reduce highway efficiency because they create more friction than standard all-season tires, which means the engine has to work harder to maintain speed.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2023 GMC Sierra 1500 Mud Terrain Tires 4WD 5.3L 8-cyl at $2,600. This calculation is based on driving 15,000 miles per year using national average fuel prices. This estimate provides a benchmark, but real-world expenses will vary based on driving habits, location, and gasoline prices. Drivers who frequently tow, haul heavy loads, or venture off-road will likely exceed this $2,600 annual fuel expenditure. However, those with shorter commutes or who primarily use the truck for highway driving may spend less.

Real-world expectations

The EPA provides standardized fuel economy estimates, but drivers should adjust their expectations. The aggressive tread pattern of the mud-terrain tires, the added weight of four-wheel drive components, and the thirsty 5.3L V8 engine can contribute to lower real-world MPG figures. Factors like driving style, ambient temperature, and terrain can impact fuel consumption. Aggressive acceleration, frequent braking, and prolonged idling will all reduce fuel economy. Expect the 17 MPG combined rating to serve as an optimistic upper limit in many cases, especially for those who regularly use the truck for its intended purpose.

How it compares

Compared to other full-size trucks with similar off-road features, the Sierra’s fuel economy is generally comparable, but small differences can be found. A comparable Ford F-150 with the 3.5L EcoBoost V6 and four-wheel drive typically achieves around 19 MPG combined, offering a slight advantage. However, if you examine SIERRA MPG across all years, you’ll see different trims and engine options can vary widely. The Ram 1500 with the eTorque Hemi V8 also gets around 17-18 MPG. These comparisons depend on the buyer’s priorities: someone focused on fuel economy might consider alternatives, while those prioritizing the Sierra’s specific features and capabilities may find the slight MPG differences negligible. Don’t forget to consider all Gmc fuel economy data across their models.

Tips to maximize efficiency

Drive smoothly and steadily. Avoid aggressive acceleration and hard braking by anticipating traffic flow to maintain a consistent speed. The 10-speed automatic transmission is designed to optimize fuel efficiency; it can only do so if you allow it to operate as intended.

Make sure your tires are properly inflated. Mud-terrain tires are sensitive to underinflation, which can increase rolling resistance and reduce fuel economy. Check your tire pressure regularly and keep it at the level recommended on the tire placard inside the driver’s side door.

Minimize idling. Letting the engine run wastes fuel. If you expect to be stopped for more than a minute or two, turn off the engine. Modern engines restart quickly and efficiently, so the fuel savings from avoiding prolonged idling can add up.

Reduce weight. Avoid carrying unnecessary cargo in the truck bed or cab. Extra weight increases the engine’s workload and reduces fuel economy. Remove any items that you don’t need for daily driving or tasks.