I went to a Pepboys to get my oil change and as I came back to pick up the tahoe, they informed me that my " Idlerarm - both inner and outer tie rod ends and sleeve needs to be replaced eventually, He said that my front end is loose."...He asked me if I felt any vibrations while driving from the wheels and I said no, nothing out of the ordinary...My question is, how do I know if I need to replace the tie rods? After I left there, I went to my place to get the tires rotated, and when they took off the tires, I didnt see anything wrong with the tie rods, but then again I dont really know what Im looking at. Any help would be great! Thanks!