I have a 96 tahoe that the power steering pump was leaking on. So I finally replaced it. But it stll whines. It does it a lot worse when its cold. It almost stops when its hot. The manual says to bleed it by turning the wheel side to side. But I think it still has air in it. Does anybody know a trick to fix this. I'm about to say this pumps defective. But I sure aint excited about changing it again.