Here is my situation. When driving in my STS, I notice some front end "noise" whenever I go over small bumps etc. It sounds like the front end is knocking or something is hitting something else. I took off my front tires and looked and wiggled but nothing jumps out. I read where it might be the stabilizer link bushings. Anyway to check? What does it take to replace? I love my STS but sometimes the money for upkeep gets pretty expensive. Any help?