How big is the gas tank on a 23 Suburban?
The 2023 Chevrolet Suburban uses a 31-gallon gas tank. This article explains the capacity across trims, how it affects driving range, and what to expect when filling up. The figure is standard for most gasoline and diesel configurations in this model year, helping with planning long trips and daily commutes alike.
Tank size across trims and options
Chevrolet lists a standard 31-gallon tank for the 2023 Suburban, applicable to both gasoline models and the Duramax diesel version. There are no widely reported smaller or larger tanks for this model year across common trims.
What this means for buyers is predictable fueling intervals and similar refueling stops whether you choose a V8 gasoline or a diesel variant, given that the tank capacity remains the same.
Key figures you should know about the Suburban's gas tank:
- Gasoline Suburban: 31 gallons (117 liters).
- Diesel Duramax option: 31 gallons (117 liters).
- Note: Tank capacity is generally consistent across trims; dealer-installed options or accessories typically do not change the base fuel-tank size.
In short, the published tank capacity for the 2023 Suburban is 31 gallons in typical configurations.
Driving range implications
Fuel capacity matters most when estimating how far you can travel between fill-ups. With a 31-gallon tank and the Suburban's mpg varying by engine and drivetrain, drivers can expect a broad range of potential distances per tank depending on city versus highway driving and configuration.
Estimated fuel-economy considerations by configuration:
- 5.3L V8 or 6.2L V8 (gasoline) with 2WD or 4WD: combined mpg typically falls in the low-to-mid teens to low-20s, depending on conditions and load.
- Duramax 3.0L diesel: often provides similar or somewhat better highway efficiency, contributing to a longer highway range per tank.
Note: Real-world fuel economy varies with payload, terrain, climate controls, and driving style. Plan for a practical range that reflects your typical use case.
Practical takeaways
For planning road trips or daily use, a 31-gallon tank gives Suburban owners a broad operating window before refueling, with highway driving generally offering a favorable range thanks to diesel and efficient gasoline configurations.
Summary
The 2023 Chevrolet Suburban standard fuel tank is 31 gallons, shared by both gasoline and diesel drivetrain configurations. This capacity translates into a substantial driving range, with expected mileage varying by engine choice and driving conditions. In practice, plan for roughly 450 to 650 miles per tank under typical loads and driving styles.
