1997 GMC Safari Owner's Manual - Page 262

/I\ CAb I'ION: If you get gasoline on yourself then and something ignitesit, you could be badlyburned. Gasoline can spray outon you if you open the fuel fillercap too quickly. This spray canhappen if your tank is nearly full, and is more likely in hot weather. Open the fuel fillercap slowly and wait for any "hiss" noise to stop. Then unscrew the cap all the way. Be careful not to spill gasoline. Clean gasoline from painted surfaces as soon as possible. See "Cleaning the Outside of Your Vehicle" in the Index. While refueling, place the cap in the holder on the fuel filler door. To take off the cap, turn it slowly to the left (counterclockwise). The cap has a spring in it; if you let go of the cap too soon, it will spring back to the right.