My front brakes make a squelling noice when i turn left on my 2003 hyundai sonata

it does not have one. Ford is the only manufacturer that uses one.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

get it checked, noises are warnings, in many cases of doom.
lug nuts falling off
brake failures, soon.
wheel bearings bad.
to name 3 of 20 possible.
get help from a person called a mechanic , have them find true cause
and avoid doom.

hi JIM
I had a similar problem with a Hyundai, it turn out the problem a loose bolt that connect a bunch of earth wires to the body on the left front near the headlight.
hope this will help you
good luck

check junction block for malfunction

Sounds like the brake light switch is bad its located under the dash behind the brake pedal.Hope this helped.

That will be your front axle or your left side ball joints, have them checked out, it will not be an easy fix or something that you can do yourself, it will continue to happen and wont get fixed with time.

check your cv axles in the front end. they are basically your drive axles. the popping while turning is usually the outer boots on the axle shafts have torn and the grease inside the boots has ran out causing the shaft to be dry and click or pop when steering. usually you can replace the boot thats torn but it must be done within a few days of it tearing otherwise you will need to replace the axle shafts.

A Hyundai Hyundai Sonata is NOT a 2002 Jeep Cherokee.

check the brake light switch it is located under the break pedal

Where do you feel the vibration? if you feel it where you sit it is coming from back which is usually rear brakes. If you feel the vibration in your feet and hands it is coming from the front which could be your ABS or front brakes.