1994 Buick Century Owner's Manual - Page 214
1994 Buick Century Manual
Page 214 highlights
When you put the cap back on, turn it to the right until you hear at least three clicks. Checking Things Underthe Hood Hood Release To open the hood, first pull the handle inside the vehicle. It is located on the lower left side of the instrument panel. NOTICE: If you need a new cap, sure to get the right be type. Your dealer can getone for you.If you get the wrong type,it may not fitor have proper venting, and your fuel tank and emissions system might be damaged. Then go to the front of the vehicle and release the secondary hood release. Lift the hood. 212