1996 Oldsmobile Achieva Owner's Manual - Page 228

When you put the capback on, turn it to the right until you hear at least three clicks. Make sure you fully install the cap. The diagnostic system can determine if the fuel cap has been left off or improperly installed. This would allow fuel to evaporate into the atmosphere. See "Malfunction Indicator Lamp" in the Index. Checking Things Under the Hood L B I NOTICE: If you need a new cap, be sure to the right get type. Your retailer can get one for If you get you. the wrong type, it may not or have proper fit venting, and your fuel tank and emissions system might be damaged. An electric fan under the hood can start up and injure you even when the engineis not running. Keep hands, clothing and tools away from any underhood electric fan. A CAUTION: Things that burn can on hot engine parts and get start a fire. These include liquids like gasoline, oil, coolant, brake fluid, windshield washer and other fluids, and plastic or rubber. or others You could be burned. Be careful not to drop or spill things that will burn onto a hot engine.