A few weeks ago, I noticed a knocking sound coming from the rear end.
This is not the common clicking sound. The clicking sound was fixed a couple months prior. The knocking sound primarily happened during slow speeds, between 15-20mph while accelerating or slowing down. The knock was loudest going over bumps or shifting from reverse to drive.
I took the Armada in last week and they kept it for 3 days. On the 3rd day they figured out what the problem was. While driving the Armada back and forth in the shop and having someone walk along side the SUV they concluded that it was a loose rear sway bar. The sway bar nut or bolt or whatever is used to attach the sway bar to the rear was loose and not functioning properly. After they replaced the sway bar, the noise is gone and the Armada now handles and feels tight once again...like a new SUV.
By the way, the Armada was purchased in May 2005.
Take Care.
Gui123tar