Ball joints.
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.
have the front swaybar links replaced
If the squeeling is coming from the tires, then the problem is most likely a misaligned front end. If the squealing is coming from the engine, then the problem would be in the power steering system.
Does this squek vary with speed? When stopped and turning right does it squeak? More info is needed
front end alignment
In the reservoir at the lower left front of the engine.
Two reason why your steering wheel is not turning.One....your ignition key is removed and you have turned the steering wheel to LOCK position.Two your front wheels are pinned against an obstacle so your front wheels are blocked.
The purpose of the steering system allows the driver to control the direction of the vehicle by turning the front wheels.
The squeaking is caused by friction between two objects that only contact each other during the turning motion of the car - in this case, in the leftward direction. This is an easy fix - stop doing it.
have front suspension checked
My guess is you have a tire ply separation going on. Check your front tires.
A bad bearing can cause can the front end of car to make a squeaking noise when turning steering wheel either direction. It can also be caused by bad suspension.