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I have a loud pumping whining noise under the rear driver tire. It does not do it on turns its constant like maybe a very loud fuel pump or something. Its not the air compressor i have check it for leaks. Anyone had or know anything about this problem??? Thanks zach

Does it occur when the vehicle is not moving? If so, it could be a leaking air line from the compressor, which is on the passenger side, or leaking air shock. There really isn't much back there. If it only occurs while moving, check the backing plate to see if it may be rubbing against the rotor. Another remote possibility is a sticking caliper. If the noise doesn't start until about 25-30 mph, then the wheel hub comes into question.

Welcome to the Club.

yup, sounds like the wheel bearing if I'm correct...

The noise is more like a leaf blower or a air leak. It does it when the car is in park and moving...gets louder as the car warms up. I can hear it when i turn the cars power on and after it starts. How do i check for a air shock leak because the noise seems to be coming from right behind the left rear wheel. If it is a leak wher can i find a new shock and whats the part number????

The ELC system shouldn't start until 30-45 seconds after the key is turned on. Begin by removing the ELC relay from the fuse box under the back seat. Check to see if the noise goes away. If not, then move on to the fuel pump.

The fuel pump should run about 5 seconds when you first turn on the key, and then stop. Remove the fuel pump relay, also in the rear fuse box, turn the key to on and check for the noise.