Chevrolet 2003 S10 Pickup Owner's Manual page 271

While refueling, hang the cap by the tether from the
hook on the fuel filler door.
If you get fuel on yourself ai-- then some ng
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.
To remove the fuel cap, turn it slowly to the left
(counterclockwise).
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