Question about 2002 Cadillac Escalade

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Cadalac escalade, when key turned on,engine not

2002 cadalac escalade, when key turned on,engine not started, there is a loud noise like something powering up; what is it? and should it be that loud if it is a normal function?

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It could be the fuel pump pressurizing the system. Does the sound stop after a few seconds? If it is the fuel pump then it is a normal sound. Fuel pumps will resonate in the tank when you are low on gas, making them sound louder. If it is more than a hum then I would get it checked out.

Posted on Nov 17, 2009

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