1997 Pontiac Firebird Owner's Manual - Page 253

When you put the cap back on, turn it to the right (clockwise) until you hear a clicking sound. Make sure you fully installthe cap. The diagnostic system can determineif the fuel cap has been left off or improperly installed. This would allow fuelto evaporate into the atmosphere. See "Malfunction Indicator Lamp" in the Index. Checkinr Things Under the Hood 1~ NOTICE: If youneed a new cap, be sure to getthe right type. Your dealer can get one for you. If you get the wrong type, it may not fit or have proper venting, and your fuel tank andemissions system might be damaged. I An electric fan under the hood can start up and injure you even when the engine is not running, i Keep hands, clothing and tools away from any underhood electric fan. Things that burn can get on hot engine parts a: start a fire. Theseinclude liquids like gasoline, oil, coolant, brake fluid, windshieldwasher and other fluids, and plastic or rubber. You or others could beburned. Be careful not to drop or spill things that will burn onto a hot engine.