1998 GMC Jimmy Owner's Manual - Page 276

When you put the cap back on, it to the right turn (clockwise) until you hear a clicking sound. Make sure you fully installthe cap. The diagnosticsystem can determine if the fuel cap been left off or has improperly installed. Thiswould allow fuel to evaporate intothe atmosphere. See "Malfunction Indicator Lamp"in the Index. Filling a Portable Fuel Container NOTICE: If you needa new cap, be sure toget the right type. Your dealer canget onefor you. If you get the wrong type, it may not fit properly. This may cause your malfunction indicator lamp to light and yourfuel tank andemissions system may be damaged. See "Malfunction Indicator Lamp" in the Index. Never fill a portable fuel container while it is in your vehicle. Static electricity discharge from the container can ignite the gasoline vapor.You can be badly burned and your vehicle damaged if this occurs. To help avoid injury to you and others: Dispense gasoline only into approved containers. Do not fill a container 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 be maintained until the filling is complete. Don't smoke while pumping gasoline. 6-7