Home and Garden How do you open the gas tank on a Chevrolet? How do you open the gas tank on a Chevrolet? https://www.youtube.com/watch?v=1r9jSuGp1BU Where is the fuel tank release button? In most cases, you will notice a removable flap on the inner side of the boot it will be located on the same side as the fuel lid. Open this flap, access a knob and turn it as indicated to release the fuel lid. Related Posts:The best work boots for electricians can be found on the Best Work Boots for Electricians Page.How Much does a gallon of propane weigh?How to replace the fuel filter on a lawn mower.Is replacing a fuel tank expensive?