1994 Buick Roadmaster Owner's Manual - Page 230
1994 Buick Roadmaster Manual
Page 230 highlights
The sedan gas cap behind the rear license plate. is To take off the cap, turn slowly to the left it (counterclockwise). While refueling, hang the cap inside the wagon fuel door. Place the cap on the inner most edge and turn it to the right as necessary to secure. 228
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