How many miles are on the car. Does it have the original ball joints and the upper A frame bushing by the downpipe. Recently found the idler arm and center link was shot on my 110,000 mile GN. That made for a sloppy drive
idlers are very well known for bein sloppy on these older gm vehicles. replace it with a quality brand part like moog or something along those lines, also tie rods and the center link like to go, actually the whole front end on these cars likes to loosen up its usually one or two parts at a time.