First - Clean V.
2nd, I assume this is a copy/paste post, as 90% of us on the forums here know what a T56 shifts like, and we pretty much all remove the CAGS from our ECU's when we build our cars. lol.
It might help if you put up and estimated value you are placing on your V, as some have gone as low as 9-10k for an OBS LS6 car, and some go for 16-17k. Most prices for clean examples are around 15-17kish. Obviously there will be some give and take there.
Also, what are you looking for in an FD? A/C, cruise, etc. The only detail you have is not a 5.3.
Just giving you some tips to help, even though I did laugh at your description simply because there are probably very few people on this forum that dont know details on CTS-V's and the LS engine platform.

Where are you located? I am assuming central WI? I am located in Madison but was taking my FD/LS out to car shows quite often, we may have met.