Spectra Premium GM32A Fuel Tank for Chevrolet/Pontiac Designed for use with gasoline containing up to 20% ethanol (E20) and diesel containing up to 5% bio diesel (B5) Volume: 18 Gallons (excluding Fuel Pump) Made with corrosion resistant O.E.M. approved Ni Terne steel Spectra Premium fuel tanks meet or exceed the performance of the original equipment fuel tanks they replace, lock ring included with tank All units are 100 percent water based leak tested after full product assembly