Two problems related to tank mounting have been reported for the 1999 Chevrolet Malibu. The most recently reported issues are listed below.
Fuel gauge periodically doesn't register the proper amount of gasoline in the tank. Have not checked it out with a service tech as yet.
When the vehicle was started the gas gauge registered full. While driving the gas gauge changed to different amounts (1/4, 1/2, 3/4) of gas. The vehicle shut down from having no gas in the tank but the gauge read full.