2004 Chevrolet Aveo Owner's Manual - Page 195

{CAUTION: If you spill fuel and then something 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 if your tank is 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. Be careful not to spill fuel. Do not top off or overfill your tank, and wait a few seconds after you have finished pumping before you remove the nozzle. Clean fuel from painted surfaces as soon as possible. See Cleaning the Outside of Your Vehicle on page 5-79. The tethered fuel cap is located behind a hinged door on the passenger's side of your vehicle. 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 it too soon, it will spring back to the right. 5-9