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Hello! I have a 2001 GMC Sierra 1500 4WD with less than 100,000 miles. It has a Vortec 5300 5.3 L V-8. Today if rove it for about 12 miles, parked and left the vehicle for about 4 hrs. When I returned to the truck and started it everything seemed fine. As I accelerated straight out of the parking space I heard a noise like a jet flying over. The jet noise continued after each acceleration but when I stopped for a red light the noise went away once I was completely stopped. Once I began to accelerate the noise began again. The tires are OK, correct pressure, all the dash information seems correct, no warnings. I am a female in her early sixties with a very ill husband at home who is unable to check the truck, drive, etc. I would sure appreciate any clues you may have for me before I take it to the dealership for a diagnosis. Manny thanks, Fredi in VA

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I would be doing the simple checks first . Open the bonnet and check the drive belt on the power steering pump to see if it is good and tensioned as what you describe sounds like a loose / failing belt. If you have a fan that is connected to the water pump grab hold of a blade and see if you can move the unit back and forth ( failed bearings ). Check any other drive belts as well. Check oil level in sump and transmission (if auto) and check water level in radiator at the cap. IT is good if you can get some idea as to what is wrong first so that the dealer cannot put it over you.

Posted on Feb 15, 2014

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SOURCE: 2001 focus. Replaced plugs, wires and coil pack.

Have you replaced the timing belt? if not i would highly recommend doing so. these cars need to have the timing belt replaced before it breaks otherwise it can and will cause major engine damage.

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SOURCE: When first driving, I hear a high pitched

I have the exact same problem, however reversed. My whistling sound stops when I accelerate and starts when my foot is off the accelerator. Frustrates me and am afraid to have it looked at for fear of the cost of fixing this problem. Have you since discovered what the problem is or was?

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SOURCE: 1999 suburban chugging and bogging

The EGR valve needs to be changed out and this should solve the problem............Very common occurance for the year and info in which you have provided..........Hope this helps you out.

Posted on Nov 21, 2010

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