I'm the owner of a 2000 Chevy Tahoe that recently started exhibiting a vibration between 65 and 75 miles an hour. I took it back to the dealer & the service manager told me the vibration was caused by my bug deflector. Only after I persisted with my complaint was I given another appointment (for four weeks later).

Has anyone else had these problems? What was done to fix them? I want to show up for my follow-up appointment with some information; because it seems like the dealership doesn't have solutions.