The EPA estimates the 2023 GMC Sierra 1500 4WD with the 5.3L V8 gets 17 MPG combined. Most buyers of this truck probably aren’t prioritizing fuel efficiency. This is a machine built for work, for hauling, for tackling challenging terrain, and for projecting a certain image. Many buyers are willing to make a compromise on gas mileage for the capability and presence the Sierra offers.

City and highway performance

The EPA estimates the Sierra gets 15 MPG in the city and 19 MPG on the highway. The city figure reflects the stop-and-go driving that plagues most urban environments, where the truck’s weight and the engine’s demands for acceleration take their toll. The highway number, while better, still isn’t stellar. Expect 19 MPG only if you maintain consistent speeds and avoid aggressive driving habits. The Sierra’s 10-speed automatic transmission tries to optimize efficiency, but the laws of physics and the demands of a powerful V8 engine determine your fuel consumption.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2023 GMC Sierra 1500 4WD with the 5.3L V8 is $2,600. This is based on driving 15,000 miles per year and using the EPA’s fuel economy estimates in conjunction with the national average fuel price. Your actual fuel costs could be higher or lower depending on your driving habits, the type of driving you do, and the price of gasoline in your area. If you tow frequently or drive mostly in the city, expect to surpass that $2,600 figure significantly. Check all Gmc fuel economy data for their entire lineup of vehicles to see the differences.

Real-world expectations

EPA estimates provide a baseline, but real-world fuel economy often differs. Several factors affect the MPG you’ll actually experience. Aggressive acceleration, heavy braking, towing, and even headwinds can all lead to lower fuel efficiency. Terrain also plays a major role; mountainous areas will require more fuel than flat highways. Cold weather generally reduces fuel economy as engines take longer to reach optimal operating temperatures.

Consider the EPA numbers as a starting point, not a guarantee. Some owners report numbers close to the EPA, but many also see lower figures, especially if they routinely use the truck for demanding tasks.

How it compares

The Ford F-150 4×4 with the 5.0L V8, a direct competitor to the Sierra, manages an EPA-estimated 19 MPG combined. This is a slight advantage over the Sierra. Models like the RAM 1500 with the eTorque Hemi also reach approximately 19-20 MPG combined. The Toyota Tundra, while often praised for its reliability, generally mirrors the Sierra’s fuel economy in similar configurations. Choosing between these trucks involves more than just MPG, but fuel efficiency is worth considering. Even a difference of 1-2 MPG can translate to hundreds of dollars saved per year, depending on driving habits. You can also find SIERRA MPG across all years to compare to other models.

Tips to maximize efficiency

Use cruise control whenever possible, especially on the highway. Maintaining a consistent speed prevents unnecessary acceleration and braking, which can improve fuel economy. On long trips, plan your route to avoid congested areas and steep inclines.

Ensure your tires are properly inflated and that your Sierra is well-maintained. Low tire pressure increases rolling resistance, while a neglected engine can run less efficiently. Stick to the manufacturers recommended service schedule. A well-tuned engine is also an efficient engine.

Minimize idling. Modern vehicles require very little warm-up time, so avoid letting your Sierra sit idling for extended periods, particularly in cold weather. If you’re stopping for more than a minute or two, turn off the engine.

Lighten your load. Remove any unnecessary cargo from the truck bed. Excess weight reduces fuel economy, so only carry what you need. Reducing the load on the engine requires less power to maintain speed.

Be mindful of your driving style. Avoid aggressive acceleration and hard braking. Gradual acceleration and anticipating traffic slowdowns can improve fuel economy, regardless of what you’re driving. Drive smoothly and predictably.