2003 Chevrolet Astro Owner's Manual - Page 226
2003 Chevrolet Astro Manual
Page 226 highlights
d lf you get fuel ignites it, you could be badly burned. Fuel can spray out on you if you open the fuel cap too quickly. This spray can happen your tank is if nearly full, and is more likely in hot weather. Open the fuel cap slowly and wait for any "hiss" noise to stop. Then unscrew the cap all the way. While refueling, let the fuel cap hang by the tether below the fuel fill opening. To remove the fuel cap, turn it slowly to the left (counterclockwise). The fuel cap has a spring in it; if you let go of the cap too soon, it will spring back to the right. Be careful not to spill fuel. Clean fuel from painted surfaces as soon as possible. See Cleaning the Outside of Your Vehicle on page 5-86. When filling the tank do not overfill by squeezing in much more fuel after the pump shuts off. 5-9