Does anyone have any info on how hard it is to replace the power steering pump. Or if you know of any websites that offer repair info. It's for a 2004 limited 5.7L. I am getting a steady high pitch noise that increases in volume when the accelerator is pressed. At first I thought it was coming from the alternator but everyone i have talked to says check the pump. I checked the fluid and thats full. I am trying to avoid high repair cost from dealership. Thanks