One problem related to tank filler pipe and cap has been reported for the 1998 Buick Park Avenue. The most recently reported issues are listed below.
It does not matter if tank is full or empty fuel backs up in neck, and will shut out onto whomever is standing in front of gas nozzle. Dealer replaced fuel filler neck. Was replaced immediately after fuel filler neck needed replacing again. Consumer feels there is a manufacturer's defect. Please provide any further information.