1998 Chevrolet Blazer Owner's Manual - Page 277

When you put the cap back on, turn it tothe right (clockwise) until you hear a clicking sound. Make sure you fully install the cap. The diagnostic system can determine if the fuel cap been left off or has improperly installed. This would allow fuel to evaporate into the atmosphere. See "Malfunction Indicator Lamp" in theIndex. Filling a Portable Fuel Container NOTICE: If you need a new cap, be sure to the right get type. Yourdealer can get onefor you. If you get the wrong type,it may not fit properly. This may cause your malfunction indicator lamp to light and your fuel tank andemissions system may be damaged. See "MalfunctionIndicator Lamp" in the Index. Never filla portable fuel container while it is in your vehicle. Static electricity discharge from the container can ignite the gasoline vapor.You can be badlyburned and your vehicle damaged if this occurs. To help avoidinjury to you and others: Dispense gasoline only into approved containers. Do not fill acontainer while it is inside a vehicle, in a vehicle's trunk, pickup bed or on any surface other than the ground. Bring the fill nozzle in contact with the inside of the fill opening before operating the nozzle. Contact should bemaintained until the filling is complete. Don't smoke while pumping gasoline. 6-7