2002 Chevy Suburban Humming Sound

Noises problem
2002 Chevy Suburban Engine Size unknown Four Wheel Drive Automatic 32,000 miles
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There is a humming sound in the steering, both when turning the wheel to the right and when going straight. The humming goes away when I turn the wheel to the left.

I have checked my power steering fluid. Any ideas? Ball Bearings? (Just guessing)... Will appreciate your diagnosis.

Thank you for your time and help.

Sincerely,
jme