High pitched sound just started. It goes REEEEEE!!
I have a 2002 Buick Regal LS with 110K miles and recently fixed a groaning noise in the front suspension. It was a bad ball joint. Now, 2 weeks later there's this unusual sound just started. When turning left or right it goes REEEEEEE from under the hood and stops after a few seconds when the wheel straightens out. It doesn't do it all the time, just occassionally. Almost sounds like the power steering pump??
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Re: high pitched sound just started. It goes REEEEEE!!
It sounds like your power steering pump as you said, but I would start with changing the main drive belt. I have come across this same problem before. If you change out the belt and you still have this problem, remove the belt and start the engine. Turn the wheels left and right and listen for the noise. If the noise is gone then put the belt back on and check again. If the noise comes back then you have a component problem. I have seen the belt tensioner to make noises as you describe. I hope this helps you. Let me know if this is helpful to you.
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It could be that you have a front wheel bearing that is getting noisy. Have someone ride in the RF seat and listen to the noise to try to figure out which front wheel the noise is coming from.
Also , check the tread pattern of the front tires to see if it has some unusual choppy pattern forming.
Regardind the A/C situation is posible that your compressor is getting stuck either for lack of internal lubrication or overpressure, either way is time to replace it. The second part might be related to the security system, the mirrors sounds like a different fuse.
First, have your daughter listen for vacuum leaks (young females generally have the best high frequency hearing) They will sound like a very high pitched whistle. Next, look for vacuum hoses that are damaged and leaking. Next, clean the throttle body. Remove the hose that goes from the air cleaner to the throttle body. Hold the throttle plate open and spray some throttle body cleaner (available at an auto parts store) in and scrub with an old toothbrush -- don't forget the top. There are other things, but these are the easy, common, obvious first tries.
The groaning noise is the power steer pump operating under duress. I would suggest having the front suspension checked for any seized or failing ball joints or control arm problems. Most suspension guys will give the undercarriage a look over for you for free to check for any failing/unsafe parts. The engine belt driving the power steer pump should also be checked in case it needs adjustment.