power steering problem on 2000 Chevrolet Impala

I had a whinning noise coming from my power steering pump so I replace the pump and now I'm still having the same whinning nosie I had before I replace the pump. What else could be my problem?

Asked by for the 2000 Chevrolet Impala
1 answer
was GM synthetic fluid used the old iype fluid will not work punp will fail