The 2019 GMC Sierra C10 2WD with the 4.3L V6 gets 17 MPG combined. While this might seem low compared to modern vehicles, it’s important to consider the context. This isn’t a fuel-efficient crossover; it’s a work truck designed for hauling, towing, and handling tough jobs. Buyers of this configuration often prioritize capability and a lower initial price over fuel savings. They understand the trade-off between utility and economy, and the Sierra’s V6 often balances those two factors well.

City and highway performance

The EPA estimates the 2019 Sierra C10 4.3L at 16 MPG in the city and 21 MPG on the highway. These figures are due to the truck’s inherent design. Stop-and-go city driving makes its weight and aerodynamics more apparent, while highway driving allows the engine to operate more efficiently. The six-speed automatic transmission optimizes fuel usage by selecting gears based on load and throttle input.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2019 GMC Sierra C10 2WD 4.3L is $2,600. This is based on driving 15,000 miles per year and using national average fuel prices. Your actual fuel spending may differ depending on your driving habits, local gasoline prices, and how much you drive in the city versus on the highway. However, the $2,600 figure provides a benchmark for comparison.

Real-world expectations

While the EPA estimates provide a baseline, real-world fuel economy can vary. If you frequently tow or haul heavy loads, expect your MPG to drop below the official ratings. Aggressive driving will also reduce fuel economy. However, drivers who accelerate smoothly, anticipate traffic, and maintain consistent speeds may get closer to, or even slightly above, the EPA’s estimates. Understanding how your driving style impacts the Sierra’s fuel consumption is key.

How it compares

The 2019 Sierra’s fuel economy is representative of its class when equipped with a similar engine. A comparable Ford F-150 with its base 3.3L V6 offered similar numbers, around 19 MPG combined. The RAM 1500 Classic with the 3.6L V6 also had similar fuel economy. The Chevrolet Silverado, mechanically identical to the Sierra and sharing the same 4.3L V6, also posted 17 MPG combined. These comparisons are helpful for buyers considering different brands and understanding that the fuel efficiency for this type of truck is relatively uniform. For better economy, consider smaller trucks with smaller engines, or hybrid or electric cars that didn’t really exist in the full-size truck segment at this time. See all Gmc fuel economy data to get a better sense of the broader picture.

Tips to maximize efficiency

Regular maintenance is important. Keep the engine tuned, the tires inflated, and the air filter clean. A well-maintained engine operates more efficiently. Neglecting basic maintenance can decrease fuel economy and cause more serious mechanical issues.

Minimize idling. Idling wastes fuel. If you’re stopped for more than a minute or two, turn off the engine. This is especially important in traffic or when waiting. Restarting the engine uses less fuel than prolonged idling.

Drive smoothly and anticipate traffic. Avoid accelerating quickly and braking hard, as these waste fuel. Look ahead, anticipate traffic, and maintain a consistent speed. This improves fuel economy, enhances safety, and reduces wear on the vehicle. You can also check out SIERRA MPG across all years to compare fuel performance across different models.

Reduce unnecessary weight. Carrying heavy items in the truck bed increases fuel consumption. Remove unnecessary cargo to lighten the load and improve MPG.

Consider your tire choice. While the factory tires are a good balance of performance and fuel economy, using a more fuel-efficient tire, designed for lower rolling resistance, can make a small difference. Ask a tire professional for options for your driving needs.