24 MPG combined is a surprisingly respectable number for the 2021 Chevrolet Silverado 4WD with the 3.0L Duramax diesel. This isn’t some small crossover; it’s a full-size, four-wheel-drive pickup truck capable of serious work. It’s aimed at buyers who need capability but don’t want to completely bleed their bank account at the pump.

City and highway performance

The EPA rates the 2021 Silverado 4WD 3.0L Duramax at 22 MPG in the city and 26 MPG on the highway. These figures demonstrate the diesel’s efficiency advantage, even in stop-and-go urban driving. The 26 MPG highway figure gets attention, showing this truck can handle long hauls and road trips without requiring constant fuel stops. Drivers often find themselves needing to commute in stop-and-go traffic before heading off for weekend adventures that are hours away. Having that balance is beneficial for the specific buyers of this trim.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 Chevrolet Silverado 4WD 3.0L Duramax at $2,300. This calculation is based on driving 15,000 miles per year and using national average fuel prices. It’s a useful benchmark for comparing running costs against other trucks and SUVs, but individual expenses will vary based on driving habits, local fuel prices, and the type of driving done most frequently. Hauling heavy payload and running through rough terrain can drastically increase fuel costs.

Real-world expectations

While the EPA estimates provide a baseline, real-world MPG often varies. How you drive, where you drive, and what you’re hauling all impact fuel economy. Drivers who frequently tow or haul heavy loads will naturally see lower MPG figures. Aggressive driving, excessive idling, and neglecting regular maintenance can also negatively affect fuel consumption. That said, careful drivers who prioritize fuel efficiency can often achieve or even exceed the EPA’s estimates.

How it compares

Compared to other full-size trucks, the 2021 Silverado 4WD 3.0L Duramax is a fuel economy leader. The equivalent Ford F-150 with its 3.0L PowerStroke diesel achieves a similar 23 MPG combined. However, the Silverado often edges it out slightly in real-world testing when not towing. Gas-powered V8s from both Chevrolet and Ford typically fall well short, often struggling to reach 20 MPG combined in 4WD configurations. Even Ram’s eTorque mild-hybrid V8, while offering improved efficiency over its standard V8, generally doesn’t match the diesel’s fuel economy. This is why buyers looking for the best possible fuel economy in a full-size, four-wheel-drive truck gravitate towards the Duramax, accepting its higher initial cost and specific maintenance requirements.

Tips to maximize efficiency

Take advantage of the Silverado’s smooth-shifting 10-speed automatic transmission. Gentle acceleration and anticipating traffic flow allow the transmission to quickly up shift into higher gears, keeping engine RPMs low and maximizing fuel efficiency. Try to avoid hard acceleration as that often requires the transmission to downshift and rev the engine to higher RPMs, negatively impacting fuel economy.

Monitor your tire pressure regularly. Under-inflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check the sticker on the driver’s side doorjamb for the recommended tire pressure and adhere to it. Proper tire inflation also contributes to better handling and tire life.

Reduce unnecessary weight. Carrying extra cargo in the bed of the truck directly impacts fuel economy. Remove any items you don’t need to haul around regularly, whether it’s tools, equipment, or recreational gear. A lighter truck is a more fuel-efficient truck.

Minimize idling. Modern diesel engines are fairly efficient when idling, but excessive idling still wastes fuel and contributes to unnecessary wear and tear. If you’re going to be stopped for more than a minute, it’s generally more fuel-efficient to turn off the engine. This is especially true in urban environments with frequent stoplights.

Keep up with scheduled maintenance. Regular oil changes, air filter replacements, and fuel filter maintenance are critical for maintaining optimal fuel economy. A properly maintained engine runs more efficiently and burns fuel more cleanly. Consult your owner’s manual for the recommended maintenance schedule.

This truck finds favor with those who need the capability of a full-size pickup truck, but acknowledge all all Chevrolet fuel economy data. Its ability to tow, haul, and navigate tough terrain with surprising fuel frugality sets it apart.