Screeching noise coming from driver side tire

You should hear a change in the sound (if brakes) by gently/progessively pushing the pedal while it is making noise. Can also make noise if caliper piston is sticky and keeping the pad in contact with the spinning disc despite releasing the brake pedal (but again should change with pedal pressure). ...can also make high pitched or sometimes rattlely while going around a corner, when the loose pad tips over to scuff against the spinning disc. . without more clues as to what when where how, ,,,must also consider belt squeal, such as from power steering, or A/C clutch, or alternator....slightly loose belt, or too much drag by A/C, power steering (which usually occurs and I am sure you have heard on other cars, when cranking the steering wheel--esp all the way) .......look through the wheels to the rotors with a light to see if even shiny wear; also if can see the thickness of the pad material.. ...(if worn out should hear the dreaded grinding noise as the metal of the pad contacts the metal rotor and grinds and melts/welds--stop you though) ....does it stop evenly? ...hope some of above may have rang true/helpful You should hear a change in the sound (if brakes) by gently/progessively pushing the pedal while it is making noise. Can also make noise if caliper piston is sticky and keeping the pad in contact with the spinning disc despite releasing the brake pedal (but again should change with pedal pressure). ...can also make high pitched or sometimes rattlely while going around a corner, when the loose pad tips over to scuff against the spinning disc. . without more clues as to what when where how, ,,,must also consider belt squeal, such as from power steering, or A/C clutch, or alternator....slightly loose belt, or too much drag by A/C, power steering (which usually occurs and I am sure you have heard on other cars, when cranking the steering wheel--esp all the way) .......look through the wheels to the rotors with a light to see if even shiny wear; also if can see the thickness of the pad material.. ...(if worn out should hear the dreaded grinding noise as the metal of the pad contacts the metal rotor and grinds and melts/welds--stop you though) ....does it stop evenly? ...hope some of above may have rang true/helpful