Hey Scotty I have a 2004 buick park avenue and the steering wheel tigh

Brendon Terry

Hey Scotty I have a 2004 buick park avenue and the steering wheel tightens up when I back out and turn the wheel or slow down to turn into a parking spot...its so bad that I am shaking all over to turn it. I have a serpentine belt..not slipping....no whinning from power steering pump..what could this be....seems to be getting worse....thanks