Check heat shield on catalytic converter
Try going to a higher octane fuel
A worn transmission gear can cause a Chevy Impala to whine when the gears change. A bad fan belt can also cause this.
Harmonic balancer
The most common cause of the whistling in a 2003 Impala is a vacuum leak. Any of the lines under the hood could be causing the noise.
ON the 2006 impala that whining noise is actually the electronics when you accelerate. Its more or less electronic pulses/signals My 06 Impala is the same.
No, cause if you do, the car will blow up due to lack of air circulation...
a bad head gasket or intake manifold gasket.
Thermostat.
It could be a weak battery or a bad ignition coil.
check the fueses check fueses
The rattle may be caused by either a bad bearing in one of the pump wheels, (ie water pump, power steering, etc.) or the belt tensioner has seized. My tracker's tensioner had seized up, and while it didn't rattle on acceleration or deceleration, it would rattle when the engine was started on a cold day, due to the belt being lose. It wasn't a squeal either, but it sounded like someone was shaking a pop can full of marbles. Living in northern Ontario Canada, we have some cold days, and it would rattle quite loudly. Other than that i really have no other ideas. Hope this helps! Good luck!
A bad idle air control sensor or a bad throttle position sensor.
It could be a number of things, you need to have the computer scanned to find out what is wrong.