[Im Lon 2]

Three days ago my 2001 Impala 3.8 starting get a chirping sound. Now, sometimes I get a No Noise at all, a Chirp, or even an Ear piercing Squeal.

The Power steering was really low when I checked it yesterday, so I topped it off, Still get the same noise. So I'm not sure if that is the problem or not. Car Turns fine?

I have Read that it could be either the Power Steering or the Tensioner. Is there a way to check which of the two I should replace?