'79 coupe deville, '04 Deville DTS White Lightning
2009 Cts4 3.0. When coming to a stop, as the rear squats back down after lifting up from the stop, you hear a noise in the rear end. Not terribly loud but noticable. Like a metal "clack" noise. Not able to duplicate it using speed bumps. Only seems to happen on stops. Before I get out there and start investigating, anything to look out for? I've done extensive searches and found a couple of TSBs but none really describing what is taking place here. Thanks.