Question about 1997 Pontiac Bonneville
Sounds like electric fuel pump in tank. Turn car off, cycle key to /onrun, (not start) , you should hear it for short time, then stop. It will return when engine started, if so, it's your fuel pump. If you never noticed it before, get fuel filter changed, to help prolong life of pump, if not on it's way out already.
Posted on Jan 16, 2009
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