When I first start to drive my truck, after sitting all night, I get this whinning noise. I am not sure if it is the power steering pump going bad or if it is the turbo. What does it sound like when the turbo is going bad on a LB7? Also I can hear it when idling or driving. The noise also fluctuates with the throttle. After the truck is warm it goes away. If it is the turbo would it stop after warming up?