1997 Buick Park Avenue Owner's Manual - Page 271

The release button for the fuel door is the left of the to steering column. There is also a manual fuel door release. This mechanism is located in the top of the tnxnk compartment, on the driver's side of the vehicle. Pull the white tab release to the fuel door. While refueling, hang the cap inside the fuel door. If necessary twist it clockwiseto secure it. To take off the cap, turn itslowly to the left (counterclockwise). 6-7