Pontiac Grand Prix 2001 - Manual (Page 268)

6-6
The tethered cap is behind the fuel door on the driver’s
side of your vehicle. While refueling, let the cap hang by the tether below the
fuel fill opening.
To remove 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.