1995 Buick Century Owner's Manual - Page 209

Be careful not to spill gasoline. Clean gasoline from painted surfaces as soon as possible. See "Cleaning the Outside of Your Buick" in the Index. When you put the cap back on, turn it to the right until you hear at least three clicks. NOTICE: The cap is behind a hinged door on the left side of your vehicle. To take off the cap, turn it slowly tothe left (counterclockwise). If you needa new cap, be sure to get the right type. Your dealer can get one for If you get you. the wrong type, it may not fit or have proper venting, and your fuel tank and emissions system might be damaged. 6-5