The C6 Z51 shocks will fit your car but most people are going with the C6 Z06 shocks. They are much cheaper and perform very nice. I have them along with the C6 Z51 sway bars. When driving around town normally there isn't much difference in ride quality or handling but when you start to push it, you can really feel the difference from both the bars and shocks.
Check with Gene Culley at
GM Parts | GM Accessories | GM Parts House for a great deal on both the shocks and bars.