Squeak coming from rear passenger

[Adrian]

02 LC 00 130k mi. I have annoying squeak coming from rear passenger side over little bump. I though it was cat heat shield, but I have used pipe clamps to tighten the shield. When driving normal 30-40MPH, don't hear it, but slow speed, driving me nuts!!
What could I look for? I have used white lithium grease to every possible areas that I thought it needed.

 

[Trunk Monkey]

Plenty of bushings back there that could get squeaky. Control arms, shocks, sway bar, panhard, etc.

 

[sdnative]

https://forum.ih8mud.com/threads/drivers-side-rear-vent-glass-squeak.821793/#post-9424086

 

[Adrian]

Well, I can tell you it is not the vent glass. It is coming from underside. I did try to rock the car to duplicate the sound, but failed. Almost sound light metal to metal hitting lightly.