Problem with my 2008 Chevrolet Impala
Mileage = 44051
3.5 V6
GM tech = JK
question = Well.. Say I want to pass someone. I get into it, RPMs go up. And I
hold it there for a minute. After i park it and let the car idle, I hear a, like a whine,
or  "power steering" whine, but its not the P.S. It won't do it when you turn. After  
letting sit and idle, if you rev a little, the engine whines, and gets louder. Any  
suggestions why my Impala is doing this? Thanks!
/

Be sure to check the trans. fluid level. Low fluid can give a whine noise that  is
related to engine speed. You may need to remove the serpentine belt after you get
the noise to start. Then re-start the engine and see if it goes away. That  would
indicate one of the accessories on the drive belt is the culprit. If it does go  away,
then re-install belt. While it is whining, you can use a stethoscope to try to  isolate
what is making the noise-Alternator, water pump, A/C compressor.
Power steering relies on a simple principle- a hydraulic pump running off a belt driven
by the engine places a small amount of fluid under pressure, which in turn assists the
steering mechanism in directing the tires as you turn the steering wheel. The system
typically includes a pump, a pressure hose assembly, a control valve, and a return line.
There are three types of power steering systems used on passenger vehicles. The first
and most popular is known as power rack-and-pinion steering. It utilizes a power unit
built directly into the rack assembly. When the wheel turns, an internal rotary valve
directs the flow of power steering fluid to the proper end of the power cylinder.
More Power Steering Information
Clunking Noise in the Steering Wheel and Front End
My 2006 Chevy Malibu has a clunk when turning and stopping.
Have read a lot about some intermediate steering shaft..
What Causes Noise in Front of Car
CHEVY HHR, COBALT, PONTIAC G6 AND OTHER MODELS all have the same
conditions of noise under the car. From creaking to rattles or squeaking.