im on h&r springs w/ kyb agx's and for some reason i always here a noise when i go over bumps in the rear i checked the mounting and 3 bolts are tight, i was thinking maybe the top nut is getting lose? please help. Also on my agx's that come with the space the nut feels like its only on the thread like an inch?


GOD : The way, the truth, and the life.

The Almighty Suspension FAQ wrote:What is that "loose lumber" sound coming from my trunk?
It came from a bad strut mount on the rear suspension. GM has issued a technical service bulletin on this issue. If your car is experiencing this problem, GM will replace those parts under warranty (if it's stull under warranty).

It's quite common. Rear struts don't get spacers either, only the front. If your rear has spacers, take them off.