A knock could be something as simple as a loose track bar or drag link bolt. Grinding? Hard to say without hearing it. That said, I agree with the others, have your dealership give it a look and if nothing else, create a paper trail for the issue.
Just out of curiosity, are all of you have or did have the premium sound system from the factory? If so, what about it were you unhappy with? Also, do you listen to loss less music or just satellite or download tracks?
Bummer. That's maybe the single worst part about high end shocks. They cost a ton to buy and then require a LOT of maintenance to keep them working well.
Don't know what a Liberty Score is but the orange man bad is no friend of Mitch McConnell. If anything, he's been very critical of him over the years and if you've been paying attention, he's openly called him a "political hack". He's even called to have him primaried before McConnell started...
Clearly, there are way too many people in powerful positions who were directly connected to him. Why else would they continue to maintain a friendship with him, ask for money from him and take text message orders during a congressional hearing targeting the orange man bad and AFTER he'd been...