I had a squeak on mine for a long time and finally noticed that it would make the noise when I'd turn the steering wheel, even when stopped. I did some investimigating and discovered that the tie rod ends were completely dry of grease. Lubed 'em up and no more squeak. I have a 98 and it's equipped with the grease fittings, I know that the newer models are not. Maybe it's possible to lift the grease boot up and put some grease under it. If that doesn't work, then the tie rod end may have to be replaced.