The 2021 Chevrolet Suburban 2WD with the 5.3L V8 gets 18 MPG combined. No one buys a Suburban for its fuel efficiency. It’s designed to haul families, gear, and sometimes a trailer, and its fuel consumption reflects that. It’s a tool, bought for its capabilities, and efficiency is a secondary, though still relevant, consideration.

City and highway performance

The EPA estimates 16 MPG in city driving and 20 MPG on the highway for this Suburban. The city figure reflects the stop-and-go nature of urban environments, where the Suburban’s weight and engine displacement work against it. The highway number, while still not stellar, benefits from the 10-speed automatic transmission, which lets the engine cruise at lower RPMs, maximizing fuel efficiency at steady speeds. These are EPA estimates, achieved in controlled conditions, so your mileage will vary.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2021 Chevrolet Suburban 2WD 5.3L 8-cyl is $2,450. This 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. Depending on where you live and how you drive, your real-world fuel expenses could be significantly higher (or, theoretically, lower). The $2,450 offers a standardized baseline for comparison, but factoring in your personal driving habits and local fuel costs is critical for budget planning.

Real-world expectations

Expectations are important with a vehicle like the Suburban. If you frequently tow, load it up with passengers, or spend most of your time in heavy traffic, your fuel economy will likely dip below the EPA estimates. If you primarily use it for long highway trips with a light load, you might see numbers closer to the 20 MPG highway rating. Aggressive driving hurts fuel economy; these huge SUVs don’t respond well to quick starts and hard braking. Understanding the vehicle’s limitations and driving accordingly is critical.

How it compares

The Suburban is in a class of large, body-on-frame SUVs where fuel efficiency is rarely a selling point. The Ford Expedition Max, with its 3.5L EcoBoost V6, achieves a similar 17 MPG combined. The Nissan Armada, packing a 5.6L V8, gets about 15 MPG combined. The GMC Yukon XL, which shares its platform with the Suburban, results in similar fuel economy. For those considering moving out of the full-size SUV class, a minivan like the Honda Odyssey (22 MPG combined) or Toyota Sienna (36 MPG combined hybrid) provide dramatically better fuel economy, but at the cost of towing capacity and off-road capability. Shoppers willing to sacrifice some space for less gas can check out all Chevrolet fuel economy data or even broader databases like SUBURBAN MPG across all years. The Suburban buyer accepts the fuel penalty for a reason; they need the space, the towing capacity, or simply the image that comes with owning such a large vehicle.

Tips to maximize efficiency

The 5.3L V8 is a proven engine, but it’s not designed for hypermiling. However, there are a few things you can do to get every possible mile per gallon. Most importantly, drive smoothly. Avoid aggressive acceleration and braking, anticipating traffic flow to maintain a steady speed.

Proper tire inflation is important. Check your tires regularly and ensure they are inflated to the recommended pressure listed on the door jamb. Underinflated tires increase rolling resistance, which negatively impacts fuel economy.

Minimize idling. If you’re stopped for more than a minute or two, turn off the engine. Modern engines are designed to restart quickly and efficiently, and prolonged idling wastes fuel. This is especially true in a large-displacement engine like the 5.3L V8.

Consider using cruise control on the highway. Maintaining a consistent speed helps to optimize fuel consumption, especially on long trips. The Suburban’s substantial weight makes it susceptible to speed fluctuations, and cruise control helps maintain a steady pace. Be mindful of road conditions but turn on cruise when prudent.

Reduce the load. Remove any unnecessary cargo from the vehicle. Extra weight requires more energy to move, which translates directly into lower fuel economy. Every pound counts, especially in a vehicle already pushing three tons.