hello, recently my 99 z28 has been making a fuel pump whine. it honestly sounds like when someone does a stereo install and has a bad ground, it makes a whining noise that goes up and down with the speed of the motor. only this whine is constant. i know it is in the rear of my car, and have eliminated it possibly being the stereo by shutting it off. i do have a recently replaced fuel filter, as of maybe 2 months ago. but this fuel pump whine just started this week. its not causing problems yet. but im pretty sure it will be on its way out pretty soon. am i correct on this assumption?