is it a "squeal" or a "squeak"? squeal being a constant noise, and squeak being a repeating noise with gaps in between, e.g. "ee-ee-ee-ee-ee-ee"

if it's a squeak and if it changes it's pace with the speed of the car, then I think it sounds like something in the brakes, or at least in the wheel area.

if it's a squeal i'd check your belts.