VZ commodore - Front Driver Window vibrates

[stevenbaus]

Hi
Have VZ commodore 2006
Power windows

When the window is all the way up, it vibrates/rattling.
If I lower it a touch it stops
Only does it when fully up
Any suggestions on how to fix or what would cause (I assume a part has worned and will need replacing, would just like to know where to start looking and what part/how to replace etc

cheers

 

[AdventraAddict]

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[ThunderVZ0410]

I have a similar problem in my ute except it's my rear window but it only vibrates as my rpm get higher, but doesn't seem to do it when my windows are down