I have a black CTS and since I bought it I see them all the time on the road now. I want to customize it but something other than the norm like rims ..I want something extremely different...so far I put a strobe kit in the head and tail light and i love that ....but I want some more ideas

try adding a motorized LCD in the Dash and spoiler(wing) on the rear glass windshield. I've seen this done on my friends maxima and it's looks Hot. I've never seen anyone else with something like it.

tint the tailights, tint the windows, billet grill in the front, and some nice 20" black rims with a chrome polished lip. Maya has some nice looking black rims.check out cardomain.com...and all the other CTS cars on there, maybe that will spark some ideas. Good luck!