I have a 2002 Yukon Denali AWD that has recenly started giving me steering problems. Sitting at idle I can easily turn my wheels to the right, but when I try to turn to the left its hard to turn and I get a medium pitched whining noise from under the hood. I took my left front tire off today and turned my wheel back and forth with no load on the drivers front. the steering seems easy and no noise is heard. I replaced the drivers side front tire and im getting the same symptoms as before. I feel no play in the wheel bearings and was wondering if the power steering pump was going out would it give me this trouble turning in one direction only? I have 22" wheels that I put on the truck about a year ago, I dont know whether this xtra weight caused me problems. Please advise.