I have Impala 2001 LS and 80 k on it.

It is good. But on exits and bridges I have shakes under the car on the right and left, like metal shakes somewhere above of front wheels. It is not good. Sounds like strots ans shocks gone?
Guys can you tell me is it time to replace for the first time my shocks and strotys on this car? How it is done? Can I replace them myself without the shop, or it is possible to do only in the shop?

Any experiences with this kind of problem?
Pl let me know.
Lenta