I had all the problems in my 2008 Pontiac Grand Prix mentioned above: Whining while turning or accelerating which seemed to be getting worse. By the time I found this forum and excitedly went to tell my hubby (the car guru of our home) that this seems to be a common problem with Pontiac vehicles and that the steering fluid system might be the problem, he was already way ahead of me under the car trying to determine if the steering fluid was leaking out of the pump or lines. He knew there had to be a leak because a few days ago, when he had suspected the issue was related to steering fluid being low and had topped it up, the noise seemed to disappear and I drove to work the next day in perfect silence; but this success was short-lived as the trip home was not as quiet. (Incidentally, the leak must happen when I am moving because there was no hint of any leakage where I park.)
My hubby found out that the leak was in the hose, evidenced by the clean piece of metal right under the hose (Yes, I got under the car too and spied the evidence.) On removing the cover (insulation?) of the hose, he saw a crack in the return hose. (Of course it had to be the one part that no auto shop in this area keeps in stock...and also the one that would be a real pain to replace!) I am attaching an image of the culprit (below), but here's a link to the image as well: https://ibb.co/TYZLKrK
(The part where you see the break is where the crack was. It was not completed split like that; he cut it at that weak point in order to be able to make clean cuts on either end to remove this section.)
He decided to improvise and fix the problem with what he had on hand rather than wait for the not-so-cheap replacement hose from the factory. Since the return hose is not the pressure hose, he figured he could replace the damaged area with a rubber hose fastened to the rest of the hose with metal zip ties. It seems to have worked because my car is no longer making any noise as I drive, accelerate or turn corners.
So all those who said to look for a leak in the steering fluid system were right on the money.
Sunday, October 6th, 2019 AT 8:02 PM