Question about 1997 GMC Safari

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Fuel pump high pitch whin sound

High pitch whin coming from fuel pump at gas tank. Fuel pump replaced 2 years ago makeing the same sound at that time.

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That sound is normal

Posted on Jan 30, 2009

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How much gas is in the tank? Is the gas old? If you only have a few gallons in the tank i would advise you to put 5 gals of fresh gas and a bottle of sea foam gas addititve.. if you gas is old it starts to turn to varnish and gets sticky, it smells really bad too.Go to auto zone or wal mart to get the sea foam and add it to a five gallon gas can then add your fresh gas into you car tank..You can also get the sea foam in a spraycan form that you can spray directly into your air intake..Can you hear if the fuel pump is running? Take your gas cap off and put your ear up to the filler tube to see if you can hear you fuel pump working, it sounds like a high pitch whinning sound..Have someone turn the key on while you listen for it..

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I have a noise in the fuel tank of my 1999 cadillac escalade is this noise could be cause by a bad fuel pump or a dirty fuel filter? Also when i turn my truck on some times a little biy of blue smoke comes...


as for the noise if it is a high pitched whine that you can hear while the engine is running its probably normal...most of them sound like this. it should be the same sound that comes on briefly as you turn the ignition on before the engine starts. if it is extremely loud, it may be a build up of debris in the filter causing too much back pressure on the pump or the pump may be on its way out. as for the blue smoke.... blue smoke is oil burning in the engine. you didnt say how many miles are on the vehicle but as a vehicle ages it will usually consume some oil as the engine is running. if the smoke only comes out on start up its probably due to the valve seals weeping a tiny bit of oil thru them and its burned up once the engine is running. its not too much to be overly concerned with at the moment, just check your oil level in the engine a little more frequently as now you know that you are consuming some oil at times. also switching to a "high milage" oil may help as they have conditioners in the oil that slightly swell rubber seals in the engine.

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I have 2 questions 1st- about a year ago i had a new fuel pump installed. (delco) In the last week i have noticed a sound like a high pitch squeal. I crawled around under the van while it was running. The...


First of all $900 for a fuel pump? You got ripped! Sorry ,I just replaced one myself and fuel pump only cost me $214 with life time warenty. if you are the least bit mechanically inclined? Get a piece of plywood about 2ft-x2ft and place on floor jack under gas tank ,siphon as much gas as you can out of gas tank,mark the three lines on the passenger side of the gas tank on top(1,2,3)and dis connect,.jack upplywood to gas tank to hold weight while loosening 2 metal bands(straps) around gas tank, there are 2 bolts on each strap, lower tank to ground and slide off jack,jack up rear of vehicle to slide gas tank from under vehicle, remove the "C" clip to release fuel pump from gas tank. reverse this procedure to reinstall new one. The only problem I had was the new O ring gasket that came with new fuel pump was too stiff not allowing enough clearance to install C clip so I used the old O ring gasket and had no problems. That occasional popping could be a cv axle assuming you have all wheel drive.

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My 1998 silverado was making a high pitch whine that the mechanic said was the electric fuel pump working extra hard,so he replaced fuel filter, that helped but now its really loud again, so i replaced...


You should remove the gas tank and have it cleaned out.Then you should just replace the fuel pump while it is all off and cleaned out.It will save you the trouble of doing it later.Good luck.

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