The 2020 Chevrolet Silverado 4WD with the 3.0L Duramax diesel gets over 25 MPG combined, a figure that is higher than expected for a full-size, four-wheel-drive pickup. This improves the Silverado’s appeal to buyers who require truck capability but want to avoid the single-digit fuel economy of older, gas-guzzling pickups. This Silverado offers a mix of features and fuel economy that previously seemed unattainable.

City and highway performance

The EPA estimates for the 2020 Silverado 3.0L diesel in 4WD configuration are impressive for both city and highway driving. Expect 23 MPG in the city, a number that surpasses many midsize SUVs. The 29 MPG highway rating is remarkable, allowing for relaxed and relatively economical long-distance cruising. This combination of city and highway efficiency reflects the advanced engineering of the 3.0L Duramax and its well-matched 10-speed automatic transmission. This transmission keeps the engine at the right power and efficiency without constant gear changes found in trucks with less refined powertrains.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Chevrolet Silverado 4WD 3.0L diesel at $2,250. This is based on driving 15,000 miles per year and national average fuel prices. Your actual fuel costs will vary depending on your driving habits, the type of driving you do, and where you live, as fuel prices change by region. Drivers who primarily use their Silverado for short trips around town may see a higher annual fuel cost, while those who frequently take long highway trips may see a lower cost. $2,250 provides a good baseline for budgeting and comparison shopping.

Real-world expectations

EPA estimates provide a useful benchmark, but real-world fuel economy often differs. Most owners of the 2020 Silverado 3.0L diesel report fuel economy close to the EPA estimates, the accuracy of the testing matches real-world use. Towing reduces fuel economy, but unlike some truck engines that drop to very low numbers under load, the Duramax diesel maintains efficiency even when working hard. Regular commutes, weekend projects, and even light towing duties will likely result in fuel economy that surprises those accustomed to the traditional gas-powered truck experience. Maintaining a steady speed and avoiding excessive idling or aggressive acceleration is key to achieving numbers closer to the 29 MPG highway figure.

How it compares

The Silverado 3.0L diesel’s fuel economy is ahead of many competitors in the full-size truck segment. The 2020 Ford F-150 with the 2.7L EcoBoost V6 achieves around 22 MPG combined in 4×4 configuration. A 2020 Ram 1500 with the 5.7L Hemi V8 and eTorque mild-hybrid system manages around 20 MPG combined with 4WD. Even the previous-generation Silverado’s gasoline engines struggle to match the diesel’s numbers, making the 3.0L Duramax a standout choice for buyers looking for less gas. Some may cross-shop against the smaller Chevrolet Colorado diesel, but the Silverado’s added space and capability, combined with similar fuel economy, often win out for those who need a true full-size truck. See SILVERADO MPG across all years.

Tips to maximize efficiency

The 10-speed automatic transmission in the 2020 Silverado 3.0L diesel is programmed to keep the engine operating efficiently. Using cruise control on the highway allows the transmission to manage gear changes and avoid unnecessary downshifts, optimizing fuel consumption. Avoiding aggressive acceleration and maintaining a steady speed are important to maximizing efficiency on the highway.

Regular maintenance, like air filter replacement, can impact fuel economy. A clogged air filter restricts airflow to the engine, forcing it to work harder and consume more fuel. Checking your tire pressure regularly is also important. Underinflated tires increase rolling resistance, which reduces fuel efficiency. Keeping your tires properly inflated improves fuel economy and extends tire life.

Minimize idling. The 3.0L Duramax, like all diesel engines, consumes fuel even when stationary. If you anticipate being stopped for more than a minute or two, turn off the engine. Cold starts consume more fuel than restarts of a warm engine, but idling burns fuel unnecessarily.

Watch the weight you carry in your truck bed. Unnecessary weight significantly impacts fuel economy, especially in city driving. Remove any tools, equipment, or other items that are not essential for your daily needs. Any reduction in weight provides better fuel economy, especially in stop-and-go driving conditions when pulling away from traffic lights.

Pay attention to the terrain. Hilly roads can reduce fuel economy. Plan your trips carefully and choose routes that are flat and straight. Use the tow/haul mode if needed if you need to tow a trailer. Tow/haul is not for everyday driving. You can find all Chevrolet fuel economy data on this website.