ok- problem of the week- I've got this low tone- high pitch wine that seems to be attributable to the fuel pump?? at least that the only thing I can think of and it does it when I engage the fuel pump but do not start the engine- just turn over the ignition to AUX. If one was hard of hearing they may not hear it but its defiantley there and stays on when the car is running. Am I barking up the right tree and any suggestiions on how to diagnosis / fix- I'm not sure how to determine if it is the pump and when its time to repalce. 99 Lesabre