That usually means that your brake pads are so worn that a metal part of the pad assembly is coming in contact with the rotor. Some brake pads have a "feeler" built in that causes you to hear a squeak when your pads are getting low without actually damaging the rotor. If your pads are digging into your rotors, you can usually have the rotors machined at least once without replacing them, as long as the gouge is not too deep.
Does this squek vary with speed? When stopped and turning right does it squeak? More info is needed
Worn or Dirty Wheel Bearing
Ball joints.
The brake shoes may be about worn out. The wheel bearings need grease
have the front swaybar links replaced
wheel bearing
No one cares!
a dog
A Trailblazer that squeaks only when turning to the left could have a problem with the steering or front wheel bearing. Turning to the left puts the right pressure on the parts to cause them to squeak.
Lose control of the right front wheel Lose control of the right front wheel Lose control of the right front wheel
on the steering wheel inside lower right front fender, in front of the right front wheel; access from underneath
Worn left front wheel bearing.