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.
A whistling noise indicates a vacuum leak.
Check heat shield on catalytic converterTry going to a higher octane fuel
I had a similar problem on my 2002 Impala which turned out to be the air filter housing cover was not put back on correctly after changing the filter. You may also want to look at all the connections & fittings in the air hoses to make sure they are seated and tight.Mikemy $.02I have seen PVC valves incorrectly installed on these as well. Dealer parts required on this one at that time. Another AnswerIs the air filter a K&N? They will make a whistling sound while accelerating also.
A chirping whistling noise!
depends on the fuel system, throttle body injection trucks make a whistling noise when accelerating due to high vacuum from the cold air intake
A bad compressor belt can cause a whistling noise while running the air conditioner. A bad engine can also cause this noise.
whistling noise from engine will be caused by a leaky gasket,sucking air. this is usually the intake manifold gasket
check the upper intake manifold gasket,may have a vacuum leak at high operating temps.
A clicking noise, when accelerating, can be caused by a worn CV joint. The CV joint can cause the axle to collapse when it breaks.
Vuvuzela and police whistling noise of loudspeakers and people
dog whistling
noise and jolting is present whilst car is idolling and accelerating