The 2024 GMC Sierra 2WD with the 5.3L V8 gets 18 MPG combined. It won’t win any efficiency awards, but most buyers of this truck have already factored that into their ownership costs. This Sierra isn’t for those prioritizing fuel economy; it’s for contractors, ranchers, and weekend warriors who prioritize capability and the sound of a V8. They’re looking for a reliable workhorse that can tow, haul, and confidently handle demanding tasks, and they’re generally willing to accept the fuel economy consequences.

City and highway performance

The EPA estimates for the Sierra 2WD 5.3L are 16 MPG in the city and 20 MPG on the highway. The city figure reflects the stop-and-go nature of urban driving, with frequent acceleration and braking significantly impacting fuel consumption. The 20 MPG highway rating is more representative of steady-state cruising, where the 10-speed automatic transmission can optimize engine RPM for efficiency. However, even on the highway, factors like speed, wind resistance, and cargo weight can easily decrease that number, especially if you’re pulling a trailer. These are lab-tested estimates, and your driving style will greatly influence the final numbers you see.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2024 GMC Sierra 2WD 5.3L V8 will be $2,450. This figure is based on driving 15,000 miles per year and using national average fuel prices. Note that your actual fuel costs may vary based on your driving habits, the type of fuel you purchase, and local fuel prices. Someone who primarily drives short distances in the city will likely exceed that figure, while someone who does mostly highway driving might come in under it. This number is a helpful baseline, but it’s not a guaranteed expense.

Real-world expectations

While the EPA provides a standardized testing methodology, real-world fuel economy can differ significantly. Owners report a range of experiences; some struggle to achieve the EPA estimates, particularly in mixed driving. Hauling heavy loads, using four-wheel drive on models equipped with it, and aggressive driving habits are the biggest reasons. However, drivers who prioritize smooth acceleration, anticipate traffic flow, and minimize idling can often get closer to the advertised figures. The trip computer in your Sierra can be a useful tool for monitoring fuel consumption in real time and adjusting your driving accordingly.

How it compares

Compared to its competitors, the 2024 GMC Sierra 2WD 5.3L V8 is in the middle of the pack. The Ford F-150 with the 2.7L EcoBoost V6 achieves a slightly better 22 MPG combined, offering better fuel economy for buyers who don’t necessarily need a V8. However, for those who prefer naturally aspirated power, the Chevrolet Silverado 1500, the Sierra’s close relative with the same 5.3L V8, posts identical EPA ratings. The choice between them is mostly a matter of styling and features. The Ram 1500 with the 5.7L Hemi V8 achieves a comparable 17 MPG combined. The Toyota Tundra, even with its turbocharged V6, doesn’t offer significant fuel economy gains, landing near the Sierra’s numbers. These comparisons matter to buyers who are weighing capability against running costs. They’re asking themselves if slightly better MPG is worth sacrificing the sound and feel of a classic American V8.

Tips to maximize efficiency

Given the Sierra’s size and powertrain, certain driving techniques can help improve fuel economy. Avoid aggressive acceleration and braking, as the 5.3L V8 responds dramatically to changes in throttle input. Anticipate traffic conditions and maintain a steady speed whenever possible. Every hard acceleration uses more fuel.

Tire pressure is another often-overlooked factor. Ensure that your tires are inflated to the recommended pressure level, which can be found on the sticker inside the driver’s side doorjamb. Underinflated tires increase rolling resistance and reduce fuel efficiency. Regularly check and adjust tire pressure, especially when temperatures fluctuate.

Minimize idling. A running engine consumes fuel even when the vehicle is stationary. If you anticipate being stopped for more than a minute or two, turn off the engine. This is especially relevant in construction zones or during long waits at traffic signals. The Sierra may have auto stop/start, but depending on trim, it may be able to be disabled, so be mindful. Check SIERRA MPG across all years.

Plan your trips efficiently. Combine multiple errands into a single trip to reduce cold starts. A cold engine operates less efficiently than a warm one, so consolidating trips can save fuel. Use navigation apps to find the most direct routes and avoid traffic congestion. Consider this when looking at all Gmc fuel economy data.

Reduce aerodynamic drag. Remove any unnecessary items from the bed of the truck, especially if they create wind resistance. A tonneau cover can help smooth airflow over the bed and potentially improve fuel economy at higher speeds.