What r problems to be on the look out for on a 1999 chevy malibu with the 3100 v6 in it and there is a rattle when i hit bumps or rough road the struts are fine

Broken stabalizer links, broken stabilizer bar, and worn out stabilizer bar bushings are fairly common. As well as the rear bushings on the front lower control arms. A quick inspection of the front end and you should be able to tell if the links are bad, bar is broken, or the lower control arm bushings are separated. If the rear bushings on the front lower control arms are seperated the lower control arm will look like it is resting on the subframe.

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