1998 Cadillac DeVille Owner's Manual - Page 294

If you get gasoline on yourself then and something ignites you could be badly burned. it, Gasoline can spray out onyou if you open the fuel filler too quickly. This cap spray can happen if your tank is nearlyfull, and is more likely in hot weather. Open the fuel filler cap slowly and wait for any L'hiss" noise stop. Then unscrew to the cap all the way. Be careful not to spill gasoline. Clean gasoline from painted surfaces as soon possible. See "Cleaning the as Outside of Your Vehicle" in the Index. When you put the back on, turn it to the right cap (clockwise) until you hear clicking sound. Make a sure you fully install the cap. The diagnostic system can determineif the fuel cap has beenleft off or improperly installed. This would allow to fuel evaporate into the atmosphere. "Malfunction See Indicator Lamp" in the Index. I I NOTICE: If you needa new cap, besure to get the right type. Your dealer can get one for I you get you. f the wrong type, may not fit properly. This may it cause your malfunction indicator lamp to light and your fueltank and emissions system may be damaged. See "Malfunction Indicator Lamp" in the Index. 3