17 MPG combined isn’t going to win any fuel-sipping awards, but for the 2019 GMC Sierra LTD C15 2WD with the 5.3L V8, it’s what you get with this kind of truck. This Sierra isn’t about maximizing every last drop of gasoline; it’s about capability, affordability, and a no-nonsense approach to getting the job done. It’s for the buyer who needs a truck for work or weekend projects, appreciates the traditional V8 rumble, and isn’t necessarily cross-shopping hybrids or smaller trucks.

City and highway performance

The EPA estimates of 15 MPG in the city and 22 MPG on the highway reflect what it’s like to own a full-size, rear-wheel-drive pickup with a proven but not particularly advanced powertrain. The 5.3L V8 provides ample power for hauling and towing, but its six-speed automatic transmission lacks the technology of newer gearboxes that help improve fuel economy. Stop-and-go city driving will certainly take its toll, as will aggressive acceleration. But on the open road, the Sierra’s highway MPG is respectable for its class, provided you keep your speed reasonable.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2019 GMC Sierra LTD C15 2WD 5.3L 8-cyl is $2,600. This figure is based on driving 15,000 miles per year and using national average fuel prices. Your actual fuel costs will vary depending on your driving habits, the specific type of driving you do (more city vs. highway), and fluctuations in gasoline prices. But $2,600 provides a benchmark when considering the overall cost to own and operate this particular truck.

Real-world expectations

The EPA estimates provide a useful baseline, but remember that real-world MPG can differ. Factors like traffic conditions, driving style, tire pressure, and even the weather can all impact fuel economy. Towing or hauling heavy loads will also drastically decrease your MPG. Owners who want better fuel efficiency can likely achieve numbers closer to the EPA estimates by driving conservatively and keeping the truck properly maintained, but those who frequently use the truck for demanding tasks should expect lower figures.

How it compares

In 2019, competing trucks with similar configurations offer varied fuel economy. For example, a comparable Ford F-150 with a 5.0L V8 and six-speed automatic manages around 17 MPG combined, mirroring the Sierra. A Ram 1500 Classic with the 5.7L Hemi and eight-speed auto achieves a slightly better 19 MPG. The key difference often lies in transmission technology. These MPG differences aren’t massive, but can be important to owners concerned about long-term costs. Buyers might also consider the newer generation Sierra with its 8-speed transmission, boosting SIERRA MPG across all years. The decision to opt for the Sierra LTD often depends on factors beyond fuel economy alone, such as price, reliability, and specific feature preferences.

Tips to maximize efficiency

The 2019 Sierra LTD C15 isn’t inherently fuel-efficient, but there are steps you can take to improve its MPG. Avoid aggressive acceleration and hard braking, as these habits consume a significant amount of fuel. Anticipate traffic flow and maintain a steady speed whenever possible to minimize unnecessary fuel consumption.

Make sure your tires are properly inflated to the manufacturer’s recommended pressure. Underinflated tires increase rolling resistance, which reduces fuel economy. Regularly check and adjust your tire pressure, especially during seasonal temperature changes.

Minimize idling. The 5.3L V8 consumes a surprising amount of fuel when idling, even for short periods. If you anticipate being stopped for more than a minute or two, turn off the engine. This is especially relevant in city driving where idling is common.

Reduce unnecessary weight and aerodynamic drag. Remove any cargo from the bed of the truck when it’s not needed, as extra weight reduces fuel economy. and consider removing roof racks or other accessories that increase aerodynamic drag, especially on highway trips.

Pay attention to maintenance. A well-maintained engine operates more efficiently. Follow the manufacturer’s recommended maintenance schedule, including regular oil changes, air filter replacements, and spark plug inspection. See all Gmc fuel economy data for information about other models and more efficient options.