05 chevy equinox makes grinding noise when I turn left.

If the axle nut isn't torqed tight enough, it can cause a lot of noise. Also if the brakes are worn out, it will cause a similar noise. The only other thing that comes to mind is if the splash guard is dragging on the brake rotor on the back side.

If it started after the pads and rotors were changed, check for bent backing plates rubbing on the rotor.

It can be in the moving parts like a Hub bearing or Constant velocity joint. You may be able to feel the roughness in the wheel assembly if the wheel is jacked off the ground and the tire is spun slowly.
It is probably doing this all along and when the brake tightens against the Rotor, the drive parts transfer a shift in force from the bottom of the weight bearing hub to the side where the Caliper is hung. The excess play sort of twists the rotor, hub, and CV joint from their normal positions when the Caliper grabs the rotor.

Rotors could be one problem.Check fluid level.Who did the brakes.Abs is sensor which is in hub bearings .Could be bad.

If you still think the noise is coming from the left side CV joint it would be more advisable to replace the entire axle as an assembly. For the time and effort it takes, you can usually get a rebuilt axle assembly for only a few dollars more than the CV joint and the boot required to repair one. You will need a large axle nut socket (usually 30 - 32mm) to remove the axle nut. The lower ball joint and tie rod will need to be separated along with the brake caliper and rotor, from the spindle. I would recheck the grinding noise before doing it. A lot of wheel bearings are mistakenly diagnosed to the wrong side. If the noise is loudest when turning left, most people would assume the left side wheel bearing is at fault. However if the noise is loudest turning left it indicates the right side wheel bearing is most likely at fault. Due to the weight distribution of the front end, turning left the weight all transfers to the right side, loading that bearing. Make sure thats not the case before tackling an axle.

Hello i would check your wheel bearings or sometimes called bearing hub .Jack car up prop the car with axle stands now remove your tires and rotors once removed wiggle you bearing hub left to the right your bearing hub should have minimal play one side to the other is obvious the looser play hub will be your noise you have been experiencing.most people call this road noise.

the left. when you turn left it pushes pressure on the bearing quieting it down turn right and it pulls the bearing you can verify this by jacking up the vehicle and tilting the wheel top to bottom you should be able to feel the play in the bearing if its making noise

could be you brake pads are low, you have a lip (indentation from ware) on you brake rotors have your brake pad linings check and turn your rotors. hope this helps

Check the condition of the wheel bearings, front and back side if the brake rotor, and the back side of the rim. Everything should be clean, rust build-up can throw everything out of true. The hub or wheel-bearing should be tight and smooth when spun.

Front hub bearing. If you were the one who replaced the pads you should have turned the hub while the caliper was off and checked for roughness or wobble. Imagine the rotor wandering from side to side and rubbing the pads; thats what a worn hub will do.