How do I fix my 2004 Buick Rendezvous bouncy suspension?

The suspension on my 2004 Buick Rendezvous is very soft and it bounces like a moonbuggy. Any ideas on how I can get it tightened?|||Have a mechanic install new shocks/struts. These control the rebound on the suspension, and when they wear out your car will bounce a bit more. One way to test if your shocks/struts need to be replaced is to push down that corner of your car with your body, then let go; your car should pop right back up to its normal height and stop without any further motion. BE CAREFUL not to crumple your fender when performing this test, though.|||Balance the tires and get new shocks.|||get some heavy duty shocks for it