Nice looking ride. Do you feel the vibration in the steering wheel or in the drivers seat?
That usually means its something in the front end causing it.I notice it more in the wheel.
Hey Brian… I know your thread is a tad old but what was the verdict? ThxHey Gang, I just got this 1999 C5 a few weeks ago. It's a standard Coupe with the Z51 suspension package. The wheels are C6, and the tires are brand new. The car handles great, but I've noticed is a rhythmic intermittent vibration at highway speed. Above 65 to 75. At 80 it seems to go away. The smoother the road the more noticeably it is. The alignment tracks straight hands off although the steering wheel is slightly off center. This vibration is not noticeable at lower speeds, or when accelerating decelerating. Highway speed, cruise control at 70...that's where it comes in. Vibration, goes away, vibration, goes away...this is a cycle. My balancer does not have a visual wobble to it so far. Wheel or Suspension bearings/bushings maybe? Any ideas? View attachment 35476