Rotor Vibration Help...

[engine24355]

I have GM rotors on all four corner of my T and have the classic GM rotor vibration at 55 MPH. I know the easiest / cheapest thing to do would to balance the wheel and rotor together, but looking at other options. Is it possible to just replace the front rotors only? Maybe with a lighter material rotor? Obviously this wil be more expensive, but just exploring other options. Thoughts??? Advice???

 

[RPM]

You could have them balanced on a wheel balancer. Just like a wheel but instead of adding weights you will use a grinder and remove metal from the heavy side.