27 MPG combined is truly impressive for the 2021 Chevrolet Silverado 2WD with the 3.0L Duramax diesel. It’s a sweet spot: all the traditional capability of a half-ton pickup without the fuel bill that typically comes with it. This truck isn’t for everyone. It’s primarily aimed at buyers who need a truck bed and towing capacity, but who also prioritize fuel efficiency in their daily driving and longer highway trips. Consider contractors, rural commuters, and weekend warriors who rack up serious miles, but don’t necessarily need four-wheel drive for their typical use case.

City and highway performance

The EPA estimates 23 MPG in the city and a stellar 33 MPG on the highway for this Silverado configuration. The city rating reflects the stop-and-go realities of urban driving, where the diesel engine’s low-end torque aids acceleration without excessive fuel consumption. The 33 MPG highway figure is where this truck truly shines. The 10-speed automatic transmission keeps the engine operating in its most efficient range at cruising speeds, making long road trips surprisingly economical. Drivers covering hundreds of highway miles per week can expect significant savings at the pump compared to gasoline V8 alternatives.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,050 for the 2021 Chevrolet Silverado 2WD 3.0L diesel. This figure is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using national average fuel prices. While individual fuel costs will vary depending on local diesel prices and driving habits, the $2,050 estimate provides a solid benchmark for comparing the fuel expenses of this Silverado against other trucks and SUVs. It’s a number that should appeal directly to budget-conscious truck buyers who also need real-world capability.

Real-world expectations

While the EPA testing provides a standardized benchmark, individual driving experiences can vary. Aggressive acceleration, frequent towing, and sustained high speeds will all negatively impact fuel economy. However, drivers who adopt a smooth driving style and stick to posted speed limits should find that achieving, or even slightly exceeding, the EPA estimates is entirely possible. The Silverado’s trip computer provides real-time and average fuel economy data, allowing drivers to monitor their efficiency and adjust their driving habits accordingly. Expect the best numbers on longer highway drives with minimal cargo or towing.

How it compares

Compared to its competitors, the 2021 Silverado 2WD 3.0L diesel holds a significant advantage in fuel economy. The Ford F-150, even with its 2.7L EcoBoost V6, typically achieves around 20-22 MPG combined in 2WD configuration. The Ram 1500 with its eTorque V6 hovers around 20-23 MPG combined. Even the most fuel-efficient non-diesel trucks struggle to match the Silverado’s 33 MPG highway rating. This fuel efficiency advantage is a key selling point for buyers who prioritize operating costs. While the diesel engine may command a higher initial price, the long-term fuel savings can offset this cost, especially for drivers who accumulate high mileage. For a more detailed look, compare the SILVERADO MPG across all years.

Tips to maximize efficiency

Diesel engines are most efficient when operating at their optimal temperature. Avoid short trips, especially in cold weather, as the engine may not fully warm up, leading to reduced fuel economy. Combine errands and plan your routes to minimize cold starts.

Maintain proper tire pressure. Properly inflated tires reduce rolling resistance, which directly translates to improved fuel efficiency. Consult the sticker on your driver’s side door jamb for the recommended tire pressure for your Silverado.

Avoid aggressive driving habits. Rapid acceleration and hard braking consume significantly more fuel. Anticipate traffic flow and maintain a smooth, consistent speed whenever possible. The 10-speed transmission works best when left to its own devices.

Minimize unnecessary weight. Hauling around extra cargo in the bed or cab of your Silverado impacts fuel economy. Remove any unnecessary items to reduce the load on the engine, especially during long trips.

When towing, keep speeds moderate and use the Tow/Haul mode. This mode optimizes the transmission’s shift points for towing, minimizing strain on the engine and maximizing fuel efficiency under load. Ignoring this can negate the diesel’s inherent advantages. You can also compare this truck against all Chevrolet fuel economy data.