I just recently bought an 09 CC with the factory 22's and I got some shackle's for the rear. How hard is it to lower it, is it any different than my older 06 model. I did my other one myself, just wondering if it's different. I'll try to get some pics soon.

 

my buddiest got an 09 and he had an 04 before and he did lowering jobs on both and he said there was no difference so i guess not man!

 

not hard, lower the back part of the hitch if you have one and leave the bolts up front somewhat tight.
unbolt shackles, replace, rebolt.

you can also take out the block and that gives you another 1"+ of drop

 

can go 7" in the rear without really needing a c-notch. But there are some of those that are bottoming out. Help bags are somewhat of a remedy for that.