How much gas does a Chevy Avalanche hold?
The Chevy Avalanche typically carries a fuel tank capacity around 26 gallons for the first-generation models, with later second-generation models commonly holding about 31 gallons. Exact capacity depends on model year and drivetrain, so check your specific truck for precision.
Fuel capacity by generation
The Avalanche was produced in two generations. Gen I spans 2002–2006, and Gen II covers 2007–2013. Each generation used a different tank size, which affects overall range and fuel economy estimates.
- First generation (2002–2006): approximately 26 gallons (about 98 liters).
- Second generation (2007–2013): approximately 31 gallons (about 117 liters).
In practice, you’ll encounter these two baseline capacities depending on the year of manufacture and configuration. If you need the exact figure for a specific vehicle, verify against the owner’s manual or the vehicle’s labeling.
How to confirm the exact capacity for your vehicle
Because tank size can vary with options, market, and minor production changes, use these sources to confirm your Avalanche’s precise capacity.
VIN-based capacity lookup
To verify the exact tank size for your specific vehicle, you can pull official specifications tied to your VIN from GM’s service data or a dealership.
- Check the owner's manual for the standard tank capacity listed for your exact model year and configuration.
- Inspect the door jamb or fuel filler label, which often lists fuel capacity and other key specs.
- Ask a Chevrolet dealer or use GM’s official service data by providing the VIN to retrieve the exact capacity.
- If needed, contact GM customer service with the VIN to obtain the precise tank size for your build.
Most Avalanches fall within the 26–31 gallon range depending on generation and configuration, but the definitive figure comes from the vehicle’s official documentation or dealer data.
Summary
Bottom line: The Chevy Avalanche’s fuel tank capacity is about 26 gallons for Gen I (2002–2006) and about 31 gallons for Gen II (2007–2013). For an exact number on a specific truck, refer to the owner’s manual, door/jamb labeling, or GM’s service data tied to the VIN.
